Question

Two functions, A and B, are described as follows

Function A
y 9x + 4
Function B
The rate of change is 3 and the y-intercept is 4
How much more is the rate of change
function A than the rate of change of function B?
2
3
6
9

Answer 1

C: 6

Explanation:

In an equation in the form y=mx+c m is the gradient or rate of change. Therefore in Function A the rate of change is 9. 9 - 3 = 6.