If f(x)=5x+4, then the inverse of f will
(a) subtract 4 from its input, then divide by 5
(b) divide its input by 5, then subtract 4
(c) divide its input by 4, then subtract 5
(d) subtract 5 from its input, then divide by 4

Question

If f(x)=5x+4, then the inverse of f will
(a) subtract 4 from its input, then divide by 5
(b) divide its input by 5, then subtract 4
(c) divide its input by 4, then subtract 5
(d) subtract 5 from its input, then divide by 4

anonymous · Answer

First, do you know how to find the inverse function of f?

anonymous · Answer

u take the negative?

anonymous · Answer

no. you write the equation as y = 5x + 4 and then solve this equation for x. can you do that?

anonymous · Answer

x=y-4/5

anonymous · Answer

no.
y = 5x + 4
y - 4 = 5x
$$x=\frac{ y-4 }{ 5 }$$

anonymous · Answer

yeah thats what i typed didnt i?