<span>X -1 3 5
y 7 3 1 </span>
avgroc = ( 1 -7) / (5 - -1) = -6/6 = -1
7 x p, product means the numbers are being multiplied.
Let x be the percent of p asked
then
m% of n = x% of p
m/100*n = x/100*p
mn = xp
x = mn/p
B and C are the same thing and they would be the two representations of the conversion that shows 12 inches is equivalent to 1 foot, so B and C are your answers