Question

Find the linear function f with f -1 (-8) = 5 and f -1 (-4) = -5.

Answer 1

u meant f inverse by -1 rite?

Answer 2

yes, inverse

Answer 3

so for finding the inverse function of function inverse, just reflect the given function wrt y=x line.
means u need to find the line joining (5,-8) and (-5,-4).

Answer 4

do you find that by simply creating the line using those 2 pts?

Answer 5

I keep getting 0 for the gradient/slope?

Answer 6

yes , the slope is (-4-(-8))/(-5-5)=-2/5

Answer 7

aaag; I was calcing Y^2 - man Im rusty - thanks a million!

Answer 8

y=-2/5x-6

Answer 9

done :)