Question

11)

If y varies directly as and y= 10 when x = 2, then what is the value of y when x = 4?
A)
2.5
B)
20
C)
40
D)
80

Answer 1

B)20

Explanation:

y=10 when x=2 and varies directly so y=5*x

when x=4 then y=5*x=5*4=20

Answer 2

B.) 20
If x goes from 2 to 4 it was multiplied by 2. you would do the same to the y. 10*2=20