Question

Iif y is directly proportional to the square root of x, what is the missing value of y in
x 4 9 36
y 1 3

Answer 1

when x is directly proportional to y, it implies that x equals y multiplied by some constant.

in this case:

y = k (sqrt(x)), where k is some constant value

using your numbers
x = 4
y = 1

1 = k (sqrt(4))
1 = k (2)
k = 0.5

Answer 2

then use k to solve for x using the proportionality given in the problem

y = (0.5) (sqrt(9))
y = 1.5

Answer 3

Twowow! it was so easy! thanks alot!