Question

Given the function ƒ( x ) = 3 x + 1, evaluate ƒ( a + 1).

Answer 1

The equation would equal Axf+f

Answer 2

We were given $f(x)=3x +1$

To find $f(a+1)$, just plug in
$(a+1)$wherever you see $x$

$f(a+1)=3(a+1)+1$

$f(a+1)=3a +3+1$

$f(a+1)=3a +4$