Given f(x) = 5x+2

[hot elm]

I don't understand how they got this. This is inverse of a function btw

Given f(x) 5x+2

[sharp temple]

f(x) = 5x + 2 ??

well its easy

[hot elm]

Can you explain then

[sharp temple]

but wait what do we have to find?

[hot elm]

The inverse

[sharp temple]

okay

so f ^(-1) [-1] = x
f(x) = -1
5x + 2 = -1
x = -3/5

[novel onyx]

To find an inverse, swap x and y then solve for y again

Then you can plug in your x value you want, in this case -1

[pallid wagon]

a trick to find the inverse of functions with only one x variable is to reverse both the flow and operators, in your case it's 5x+2, which means:

1. Multiply x by 5
2. Add 2 to the result
   To find the inverse:
3. Subtract x by 2
4. Divide the result by 5
   Hence f^-1(x) = (x-2)/5

[hot elm]

I'm late but thank you I understand now