Question

What is the inverse function of y=3x-8.7

Answer 1

"switch" y and x and solve for y

so, if the original function is y = 3x - 8.7, you switch y and x to get

x = 3y - 8.7

solve again for y

Answer 2

To find the inverse, switch the x and y.

x = 3y-8

Solve for y.

(x+8)/3 = y

Answer 3

thats the inverse

Answer 4

Can u explain how u solve for y please

Answer 5

sure, so we have:

x = 3y - 8.7

what do you get when you add 8.7 to both sides?

Answer 6

?

Answer 7

after you add 8.7 to both sides:

x + 8.7 = 3y - 8.7 + 8.7 = 3y, are you with me so far?

Answer 8

all I did was add "+ 8.7" to both sides

Answer 9

Okay

Answer 10

now, divide both sides by 3

Answer 11

Okay

Answer 12

So its (x+8.7)/3=y

Answer 13

yup! great job!

Answer 14

Cool thanks