First find the equation of y.

Find the slope m.
.
Pick one point, I'll pick (-3, 9). Insert coordinates in equation then compute n.
.
The equation of a line y is:
.
The perpendicular line
is same like the normal line except its slope m becomes:
.
The equation of a perpendicular bisector is thus:
.
Hope this helps.
X= 4/7 because it would be
4/35x=16/245
which would be 28x=16
simplified it would be 4/7
don't quote me on this but I'm pretty sure it's H multiplication property of inequality
Answer:
$1.60 per paper
Step-by-step explanation:
$1600/ 1000= $1.60 per paper