Question

assume that a varies directly as b. when the value of a is 5 the value of b is 18. when the value of a is 22 what is the value of b?

Answer 1

The value of b when a is 22 is 79 1/5

Explanation:

a varies directly as b

Let k be the constant of proportionality;

then;

a = kb

5 = k * 18

k = 5/18

Finding the value of b, when a is 22

22 = 5/18 * b

5b = 18 * 22

b = (18 * 22)/5 = 79 1/5