A student is attempting to find the equation of a line given a point and the slope. Which of the following statements best applies to the sample mathematical work shown below?
Given (10, –2) with a slope of –1, I find an equation for the line by plugging in values I'm given into a point-slope form equation. Thus I have y – (–2) = –1( x –10), which results in an equation of y = –x + 8.
A.

The student improperly set up the equation to find the y-intercept.
B.

The student used the correct equation to find the y-intercept. However, he did not solve for the y-intercept properly.
C.

Question

A student is attempting to find the equation of a line given a point and the slope. Which of the following statements best applies to the sample mathematical work shown below?
Given (10, –2) with a slope of –1, I find an equation for the line by plugging in values I'm given into a point-slope form equation. Thus I have y – (–2) = –1( x –10), which results in an equation of y = –x + 8.
A.
	
The student improperly set up the equation to find the y-intercept.
B.
	
The student used the correct equation to find the y-intercept. However, he did not solve for the y-intercept properly.
C.

imer · Answer

The answer should be "A".