Question

If y varies directly with x, and y= 4/5 when x= 5:

Find the variation constant, k

Answer 1

k = 4/25 or 0.16

Explanation:

Given the following data;

y = 4/5

x = 5

To find the variation constant, k;

y is directly proportional to x

Mathematically, y = kx

Substituting into the formula, we have;

4/5 = k5

Cross-multiplying, we have;

4 = 25k

k = 4/25