Question

If x1=5, y1=7.5, x2=7.5 then find y2 if x and y vary directly

Answer 1

Answer:

if it is in direct proportion

5 = 7.5

7.5 = y

5y = 7.5 x 7.5

5y = 56.25

y = 56.25÷5

y = 11.25