Slope = -2 for a line on a graph with x on the horizontal axis and y on the vertical axis.If x increases by 4, what happens to y?
A) y increases by 8.
B) y increases by 2.
C) y decreases by 4.
D) y decreases by 8.

Question

Slope = -2 for a line on a graph with x on the horizontal axis and y on the vertical axis.If x increases by 4, what happens to y?  
A) y increases by 8. 
B) y increases by 2. 
C) y decreases by 4. 
D) y decreases by 8.

Quizplus · Accepted Answer

Since the slope of the line is -2, we know that for every increase of 1 in the x-coordinate (horizontal axis), the y-coordinate (vertical axis) decreases by 2. Therefore, if x increases by 4, we expect y to decrease by 8. So the correct answer is D, "y decreases by 8."

Slope = -2 for a Line on a Graph with X