Y= -2+21
This is because the slope needs to be the negative reciprocal of 1/2 so the slope is -2 then you take the point (5,11) and plug that an the -2 into y=m(x)+b and you solve for b. In the end you get 21
(a+b+c)/2. this is your answer. if it had the numbers i would solve it fully, but it only has variables.
2 times 8 equals 16 + 10 equals 26
