All GED Math Resources
Example Questions
Example Question #13 : X Intercept And Y Intercept
What is the y-intercept given the following function?
The following equation is already written in slope-intercept form.
The y-intercept is the variable .
Since the value is absent, the y-intercept is zero.
The answer is:
Example Question #761 : Geometry And Graphs
Find the x-intercept of the line with the equation .
Recall that at the x-intercept, the y-coordinate will be . Thus, plug in for in the given equation.
The coordinates of the x-intercept is located at .
Example Question #51 : Coordinate Geometry
Find the x-intercept of the following equation:
Find the x-intercept of the following equation:
The x-intercept is the point where the line crosses the x-axis. At this point, the y-value must be 0.
To find the x-intercept, plug in "0" for y and solve for x.
Now finish up by dividing by 2:
We can check our answer by plugging it back into our equation:
Everything looks good, so our answer is -8.5
Example Question #762 : Geometry And Graphs
The following points lie on a line.
What is the equation of the line?
Start by finding the slope of the line by using any two points.
Recall how to find the slope of a line:
Using the points , we can find the slope.
Now, we can write the following equation:
To find the value of , the y-intercept, plug in any point into the equation above. Using the point , we can write the following equation:
Thus, the complete equation for this line is .
Example Question #14 : X Intercept And Y Intercept
Find the x intercept of the following linear equation.
Find the x intercept of the following linear equation.
x intercepts occur when y=0, in other words, when we have no height.
So, plug in 0 for y and solve for x
So our x intercept is negative one half.
Example Question #761 : Geometry And Graphs
Find the y intercept of the following linear equation.
Find the y intercept of the following linear equation.
The y-intercept occurs when x is 0. Find it by plugging in 0 for x and solving for y.
So our answer is 1.5
Example Question #1 : Parallel And Perpendicular Lines
Which of the following equations depicts a line that is perpendicular to the line
?
The given equation is written in slope-intercept form, and the slope of the line is . The slope of a perpendicular line is the negative reciprocal of the given line. The negative reciprocal here is . Therefore, the correct equation is:
Example Question #2 : Parallel And Perpendicular Lines
Which of the following equations is represented by a line perpendicular to the line of the equation ?
The equation can be rewritten as follows:
This is the slope-intercept form, and the line has slope .
The line of the equation therefore has slope
Since a line perpendicular to this one must have a slope that is the opposite reciprocal of , we are looking for a line with slope .
The slopes of the lines in the four choices are as follows:
;
;
:
: - this is the correct one.
Example Question #2 : Parallel And Perpendicular Lines
Which of the following equations is represented by a line perpendicular to the line of the equation ?
can be rewritten as follows:
Any line with equation is vertical and has undefined slope; a line perpendicular to this is horizontal and has slope 0, and can be written as . The only choice that does not have an is , which can be rewritten as follows:
This is the correct choice.
Example Question #2 : Parallel And Perpendicular Lines
Which of the following equations is represented by a line perpendicular to the line of the equation ?
The equation can be rewritten as follows:
This is the slope-intercept form, and the line has slope .
The line of the equation has slope
Since a line perpendicular to this one must have a slope that is the opposite reciprocal of , we are looking for a line that has slope .
The slopes of the lines in the four choices are as follows:
:
:
:
: - the correct choice.
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