Option C:
is the equation that have a greater rate of change.
Step-by-step explanation:
From the graph the coordinates are (0,0), (20,6), (40,12), (60,18) and (100,30)
We need to determine the rate of change.
The rate of change can be determined using the formula,

Substituting the any two coordinates in the formula, we get, the slope of the equation.
Let us substitute the coordinates (20,6) and (100,30)
Thus, we have,

Simplifying, we get,

Dividing, we get,

Also, the y - intercept of the equation is

The equation of the line becomes

Thus, the equation that has a greater rate of change is

Hence, Option C is the correct answer.