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Algebra 1 : Equations of Lines

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Example Questions

Example Question #13 : How To Find The Midpoint Of A Line Segment

What is the midpoint of a line with endpoints of (12,3) and (28,9)?

Possible Answers:

(12, 8)

(8,3)

(20,3)

(8,6)

(20,6)

Correct answer:

(20,6)

Explanation:

To find the midpoint of a line, plug the endpoints into the midpoint formula:

$\left(\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2}\right)$

This gives you

$\left(\frac{12+28}{2},\frac{3+9}{2}\right)$

(20,6)

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Example Question #856 : Functions And Lines

What is the midpoint of a line with endpoints of (8,-4) and (20,2) ?

Possible Answers:

(14,-1)

(6,10)

(10,4)

(28,-2)

(5,-2)

Correct answer:

(14,-1)

Explanation:

To find the midpoint of the line, plug the endpoints into the midpoint formula, which is

$\left(\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2}\right)$

Doing this gives you

$\left(\frac{8+20}{2},\frac{-4+2}{2}\right)$

(14,-1)

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Example Question #21 : How To Find The Midpoint Of A Line Segment

What is the midpoint of a line segment with endpoints of (-7,4) and (3,16) ?

Possible Answers:

(-2,10)

(-1,5)

(-4,20)

(10,-2)

(20,-4)

Correct answer:

(-2,10)

Explanation:

To find the midpoint of the line segment, plug in the endpoints to the midpoint formula, which is

$\left(\frac{x_{1}+x_{2}}{2},\frac{y_{1}+y_{2}}{2}\right)$

This gives you

$\left(\frac{-7+3}{2},\frac{4+16}{2}\right)$

which equals

(-2,10)

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Example Question #858 : Functions And Lines

What is the midpoint for the line segment between the points $\left ( -3,7 \right )$ and $\left ( 5,10 \right )\ ?$

Possible Answers:

$\left ( -4,\ -1.5 \right )$

$\left ( 1,\ 8.5 \right )$

$\left ( 4,8 \right )$

$\left ( 0,8 \right )$

$\left ( 3.5,\ 6 \right )$

Correct answer:

$\left ( 1,\ 8.5 \right )$

Explanation:

To find the midpoint, use the midpoint formula:

$Midpoint = (\frac{x_{1} + x_{2}}{2}, \frac{y_{1}+y_{2}}{2})$

For this problem, this would be:

$(\frac{-3+5}{2}, \frac{7+10}{2}) = (1, 8.5)$

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Example Question #31 : Midpoint Formula

What is the midpoint of the line segment between points (1, 8) and (-7, 10) ?

Possible Answers:

(3, -9)

(-3,-9)

(-3, 9)

(3,9)

None of the other answers are correct.

Correct answer:

(-3, 9)

Explanation:

$(\frac{x_1+x_2}{2}, \frac{y_1+y_2}{2})$ is the midpoint formula and will give the midpoint coordinates.

Plug in the numbers from the given ordered pairs:

$(\frac{1+(-7)}{2},\frac{8+10}{2})$

$(\frac{-6}{2},\frac{18}{2})$

(-3,9)

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Example Question #614 : Equations Of Lines

Find the midpoint of the line segment with these endpoints: (5, 7) and (9, 15) .

Possible Answers:

(8, 12)

(4, 8)

(7, 11)

(14, 22)

Correct answer:

(7, 11)

Explanation:

The midpoint formula is

$\left(\frac{x_{1}+x_{2}}2,\frac{y_{1}+y_2}{2}\right)$ .

Add the two values together and divide the total by two to find the value of the midpoint. Add the two values together and divide the total by two to find the value of the midpoint.

$\\ \left(\frac{5+9}2,\frac{7+15}{2}\right)\\ \\=\left(\frac{14}{2},\frac{22}{2} \right )\\ \\=(7,11)$

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Example Question #861 : Functions And Lines

What is the midpoint of the points (-2,3) and (1,2) ?

Possible Answers:

$\left(\frac{1}{2},\frac{5}{2}\right)$

$\left(-\frac{5}{2},\frac{1}{2}\right)$

$\left(-\frac{1}{2},\frac{5}{2}\right)$

$\left(-\frac{1}{2},-\frac{5}{2}\right)$

$\left(\frac{1}{2},-\frac{5}{2}\right)$

Correct answer:

$\left(-\frac{1}{2},\frac{5}{2}\right)$

Explanation:

The midpoint between two points can be found by the equation $(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})$ . Substiuting in the equation becomes $(\frac{-2+1}{2},\frac{3+2}{2})$ . If you simplfy it the the midpoint is $(-\frac{1}{2},\frac{5}{2})$ .

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Example Question #22 : How To Find The Midpoint Of A Line Segment

What would be the midpoint of a line with endpoints $\small (-3, 6)$ and $\small (15, 4)$ ?

Possible Answers:

$\small (9,5)$

(9,1)

$\small (6,2)$

$\small \small (6,5)$

Correct answer:

$\small \small (6,5)$

Explanation:

To find the midpoint, we just need to find the mean of the x-coordinates, and then the mean of the y-coordinates. To find the mean, add the two numbers together and then divide by 2.

Our x-coordinates are -3 and 15.

Their mean is

$\small \frac{-3+15}{2}=\frac{12}{2}=6$ .

Our y-coordinates are 6 and 4.

Their mean is

$\small \frac{6+4}{2}=\frac{10}{2}=5$ .

This gives us a new coordinate pair of $\small (6,5)$ .

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Example Question #36 : Midpoint Formula

The endpoints of a line segment are $\small (0,0)$ and $\small (-20, 4)$ . What is the midpoint?

Possible Answers:

$\small (0,-8)$

$\small (10, 2)$

$\small \small (2, -10)$

$\small (-10,2)$

Correct answer:

$\small (-10,2)$

Explanation:

In order to find the midpoint, we have to find the mean of the x-coordinates of the endpoints, and then find the mean of the y-coordinates of the endpoints. To find the mean, add the two numbers together then divide by 2.

The x-coordinates are 0 and -20.

Their mean is

$\small \frac{0 + -20}{2}=\frac{-20}{2}=-10$ .

The y-coordinates are 0 and 4.

Their mean is

$\small \frac{0+4}{2}= \frac{4}{2}= 2$ .

This gives us a new x-, y-coordinate pair of $\small (-10,2)$ .

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Example Question #22 : How To Find The Midpoint Of A Line Segment

Find the midpoint of a line containing the points (-2,2) and (2,4) .

Possible Answers:

(-2,0)

(-2,-4)

(0,3)

(0,2)

(3,0)

Correct answer:

(0,3)

Explanation:

Use the midpoint formula:

$\frac{x_{2}+x_{1}}{2}, \frac{y_{2}+y_{1}}{2}$

Remember points are written in the following format:

(x,y)

Substitute.

$\frac{\left ( -2+2 \right )}{2} , \frac{\left ( 2+4 \right )}{2}$

Simplify.

$\frac{\left ( 0 \right )}{2} , \frac{\left ( 6)}{2}$

(0,3)

Our midpoint is (0,3) .

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Algebra 1 : Equations of Lines

Study concepts, example questions & explanations for Algebra 1

All Algebra 1 Resources

Example Questions

Example Question #13 : How To Find The Midpoint Of A Line Segment

Example Question #856 : Functions And Lines

Example Question #21 : How To Find The Midpoint Of A Line Segment

Example Question #858 : Functions And Lines

Example Question #31 : Midpoint Formula

Example Question #614 : Equations Of Lines

Example Question #861 : Functions And Lines

Example Question #22 : How To Find The Midpoint Of A Line Segment

Example Question #36 : Midpoint Formula

Example Question #22 : How To Find The Midpoint Of A Line Segment

All Algebra 1 Resources

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