Algebra 1 : Functions and Lines

Study concepts, example questions & explanations for Algebra 1

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Example Questions

Example Question #1 : Functions And Lines

The points \displaystyle (3,4) and \displaystyle (-2,5) are plotted on a quadrant. Which graph depicts the correct points?

Possible Answers:

Question_4_correct

Question_4_incorrect_3

Question_4_incorrect_2

Question_4_incorrect_1

Correct answer:

Question_4_correct

Explanation:

A quadrant is set up in such a way that the positive numbers are to the right and top, while the negative numbers are to the left and bottom. The x-value (the first number in the ordered pair) is the distance left or right from the center. The y-value (the second number in the ordered pair) is the distance above or below the axis.

\displaystyle (3,4) will be \displaystyle 3 units to the right, and \displaystyle 4 units up.

\displaystyle (-2,5) will be \displaystyle 2 units to the left, and \displaystyle 5 units up.

Example Question #1 : How To Graph An Ordered Pair

Which of the followiing quadrants would contain the point \displaystyle (0,5) ?

Possible Answers:

None of the other answers is correct.

Quadrant I

Quadrant IV

Quadrant III

Quadrant II

Correct answer:

None of the other answers is correct.

Explanation:

\displaystyle (0,5) has 0 as its \displaystyle x-cordinate and is therefore on the \displaystyle y-axis, which is not part of any of the four quadrants.

Example Question #2 : How To Graph An Ordered Pair

Which of the following points would be in Quadrant III on the coordinate plane?

Possible Answers:

\displaystyle (5,3)

\displaystyle (5,-3)

None of the points listed would be in Quadrant III.

\displaystyle (-5,3)

\displaystyle (-5,-3)

Correct answer:

\displaystyle (-5,-3)

Explanation:

Quadrant III comprises the points whose \displaystyle x- and \displaystyle y- coordinates are both negative. This makes \displaystyle (-5,-3) the correct choice.

Example Question #3 : How To Graph An Ordered Pair

Which of the following quadrants would contain the point \displaystyle (6,0) ?

Possible Answers:

None of the other answers is correct.

Quadrant III

Quadrant IV

Quadrant II

Quadrant I

Correct answer:

None of the other answers is correct.

Explanation:

\displaystyle (6,0) has 0 as its \displaystyle y-coordinate and is therefore on the \displaystyle x-axis, which is not part of any of the four quadrants.

Example Question #2 : Functions And Lines

Which of the following ordered pairs is in the third quadrant?

Possible Answers:

\displaystyle \left ( -5,-8 \right )

\displaystyle \left ( -1,3 \right )

\displaystyle \left ( 4,3 \right )

\displaystyle \left ( 5,8 \right )

\displaystyle \left ( 2,-3 \right )

Correct answer:

\displaystyle \left ( -5,-8 \right )

Explanation:

The third quadrant is the lower left quadrant, where both the \displaystyle x and \displaystyle y values are negative.  The point \displaystyle \left ( -5,-8\right ) is the only point that is in this quadrant.

Example Question #1 : Points, Lines, And Rays

Which of the following points is in Quadrant IV on the coordinate plane?

Possible Answers:

Two of these points are in Quadrant IV.

\displaystyle (-4,7)

\displaystyle (4,7)

\displaystyle (4,-7)

\displaystyle (-4,-7)

Correct answer:

\displaystyle (4,-7)

Explanation:

Quadrant IV consists of the points with positive \displaystyle x-coordinates and negative \displaystyle y-coordinates. Therefore \displaystyle (4,-7) is the correct choice.

Example Question #2 : How To Graph An Ordered Pair

Picture2

Find the point that corresponds to the following ordered pair:

\displaystyle (4, -2)

Possible Answers:

\displaystyle D

\displaystyle B

\displaystyle A

\displaystyle C

Correct answer:

\displaystyle B

Explanation:

In order to get to the point \displaystyle (4, -2), start at the origin and move right \displaystyle 4 units and down \displaystyle 2 units.

This is point \displaystyle B.

Example Question #3 : How To Graph An Ordered Pair

Picture1

Find the point that corresponds to the following ordered pair:

\displaystyle (1, 2)

 

Possible Answers:

\displaystyle C

\displaystyle A

\displaystyle B

\displaystyle D

Correct answer:

\displaystyle A

Explanation:

In order to get to the point \displaystyle (1, 2), start at the origin and move right \displaystyle 1 unit and up \displaystyle 2 units.

This is point \displaystyle A.

Example Question #1 : Functions And Lines

Picture3

Find the point that corresponds to the following ordered pair:

 

\displaystyle (-1, -1)

Possible Answers:

\displaystyle C

\displaystyle A

\displaystyle D

\displaystyle B

Correct answer:

\displaystyle A

Explanation:

In order to get to the point \displaystyle (-1, -1), start at the origin and move left \displaystyle 1 unit and down \displaystyle 1 unit.

This is point \displaystyle A.

Example Question #5 : How To Graph An Ordered Pair

Picture4

Find the point that corresponds to the following ordered pair:

\displaystyle (7,2)

Possible Answers:

\displaystyle C

\displaystyle A

\displaystyle B

\displaystyle D

Correct answer:

\displaystyle C

Explanation:

In order to get to the point \displaystyle (7, 2), start at the origin and move right \displaystyle 7 units and up \displaystyle 2 units.

This is point \displaystyle C.

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