Answer:
6.40 saved 33.60 needed
Step-by-step explanation:
She needs $40 *16% = $6.40
$6.40 saved - $40 = $33.60 needed
I graphed it for you in the image below.
f(x)=1 (B)
f(x) = 2X-7
f(4) = 2(4)-7
=8-7
=1
