Question

find the average rate of change of the function x1 to x2. Function:f(x)=-2x+15 x-Values: x1=0, x2=3

Answer 1

-2

Answer 2

it's a straight line, the gradient ("rate of change") is constant.

Answer 3

please confirm the function in the question is:

f(x)=-2x+15x if that's true, then we can combine like terms and get f(x)=13x

maybe it's:
f(x)=-2x^2+15x

or something else ?

Answer 4

Fairly sure they meant f(x)=-2x+15 SPACE x values: .....

Answer 5

oh :) you're probably right