Question 206268
{{{f(x)=-(3/4)x+2}}}
let {{{y=f(x)}}}
{{{y=-(3/4)x+2}}}<br>
Switch x and y.
{{{x=-(3/4)y+2}}}
Solve for y.
{{{x-2=-(3/4)y}}}
{{{y=-(4/3)x+8/3}}}
<br>
Compare that to {{{b= -(4/3)a + 8/3}}}.  Your answer key used a and b in place of x and y.