Question

What is the rate of change in y per unit change in x for this linear function?

A. -5
B. -2.5
C. -2
D. -0.4

Answer 1

B. -2.5

Explanation:

This is asking for gradient. Pick any two points (x, y) then calculate the y change ÷ x change. example, (0, -5) and (-2, 0). with [0-(-5) ÷ -2-0] you get -2.5