Question

ANSWER BOTH FOR 15 POINTS!!!!

Answer 1

y = kx is the formula for direct variation

8 = k*20

divide by 20

8/20 =k

divide by 4

2/5 =k

y = 2/5 x

formula: y = 2/5x

b) y=2/5x

y = 2/5 *7

y = 14/5

or as a mixed number 2 4/5