Question

Y is directly proportional to x when y=30 and x=6 what is the value of y when x=12

Answer 1

Answer:

The value of y when x = 12 is equal to 60.

Step-by-step explanation:

Since, y is directly proportional to x, then it can be written as follows.

y ∝ x

y = kx                                 ... (1)

It is given that when y =30 and x = 6 then y is directly proportional to x.

Substitute 30 for y and 6 for x in equation (1) as follows:

30 = k(6)

k = $\frac{30}{6}$

k = 5

To obtain the value of y if x = 12, then substitute 12 for x and 5 for k in equation (1) as follows:

y = 5(12)

y = 60

Therefore, the value of y when x = 12 is equal to 60.