## anonymous one year ago if f(x)= x+3 / 4 (x+3 over 4), what is the equation for f^–1(x)? a. f^–1(x) = 4(x - 3) b. f^–1(x) = 4x + 3 c. f^–1(x) = 4(x + 3) d. f^–1(x) = 4x - 3

1. anonymous

$f(x)=\frac{x+3}{4\left(\dfrac{x+3}{4}\right)}$Is this your problem?

2. anonymous

$$\bf f(x)={\color{blue}{ y}}=\cfrac{{\color{brown}{ x}}+3}{4} \quad \textit{do the switcharoo baby}\quad {\color{brown}{ x}}=\cfrac{{\color{blue}{ y}}+3}{4}\impliedby f^{-1}(x)$$

3. anonymous

$f(x) = \frac{ x+3 }{ 4 }$

4. campbell_st

so the function is $y = \frac{x + 3}{4}$ to find the inverse swap x and y $x = \frac{y + 3}{4}$ now make y the subject of the equation

5. anonymous

Oh I simply read it wrong, whoops.