You have not provided the complete question (value of y at a certain value of x), therefore, I cannot give u a specific final answer. However, I can explain how to solve this problem and you can apply on the numbers you have.
y varies directly with x means that as x increases, y also increases and vice versa. This can be represented by the following equation: y = kx where k is the constant of proportionality.
Solving this for k, we would find that: k = y/x
Examples: If we are given that y = 4 at x = 2, then: k = y/x = 4/2 = 2 If we are given that y = 1 at x = 3, then: k = y/x = 1/3 In general, if we are given that y = a at x = b, then: k = a/b
