Question

Y is 5 when x is 2.5, and y varies directly with x.. Find y when x is 10.. 5. 7.5. 12.5. 20

Answer 1

The answer that you are looking for is "20"

Answer 2

Most of the information's required for solving this problem is already given in the question. Let us write them down first and then concentrate on the problem in hand.

When y = 5, then x = 2.5
So
y = kx
5 =2.5k
k = 2
Now, when x = 10, then
y = kx
= 2 * 10
= 20
From the above deduction, we can conclude that the correct option among all the options that are given in the question is the last option.