Question

which of the graphs shown has a constant rate of change?
a. graph w only
b. neither graph has a constant rate of change
c. both graph w and graph x
d. graph x only

Explanation:

A constant rate of change means the graph is a straight line (linear function), as linear functions have a consistent slope (rate of change). Graph W is a curve (non-linear, exponential or rational function), so its rate of change varies. Graph X is a straight line, so it has a constant rate of change.

Answer:

D. Graph X only