Given a linear curve, the value on the y-axis changes from 100 to 120 when the value on the x-axis changes from 20 to 10, then the slope of that curve is
A)-20.
B)+20.
C)-2.
D)+2.

Question

Quizplus · Accepted Answer

The slope of a linear curve is the change in the y-value divided by the change in the x-value. In this case, the change in the y-value is 20 (from 100 to 120) and the change in the x-value is -10 (from 20 to 10). Therefore, the slope is:

slope = (change in y-value) / (change in x-value) = 20 / (-10) = -2

So the correct answer is C, "-2".

Given a Linear Curve, the Value on the Y-Axis Changes