Question

y varies directly as x. if y=40 when x=5, find y when x is 10.

Answer 1

Answer:

y = 80

Step-by-step explanation:

x/y = 5/40

=> x : y = 1 : 8

so

when x is 1, y = 8

=> when x = 10

y = 10 × 8 = 80