Use the slope formula
y2-y1
m=---------
x2-x1
(rise-->y over run-->x)
so it would be
9-5
m=-------
1-10
and that would simplify to
4
----
-9
and that would be your slope.
Hope that helped :-)
Your answer is $18.00
Because 14.40 x 100/80 =$18
Hope this helps
Please please please like my comment
That is the answer , i looked it up for you my self :)