Find the constant of variation and write the formula to express the relationship using that constant. 1. a varies directly as b and a = 15 when b = 5
2. p is jointly proportional to q and r and p = 12 when q = 8 and r = 3
3. c varies inversely as d and c = 7 when d = 4
4. t varies directly as the square of u and t = 6 when u = 3
5. e varies jointly as f and g and e = 24 when f = 3 and g = 2
6. w is inversely proportional to the cube of x and w is 54 when x = 3
7. h is directly proportional to j and h = 12 when j = 8 8. a is jointly proportional with the square of x and the square root of y and a = 25 when x = 5 and y = 9
9. m is inversely proportional to n and m = 1.8 when n = 2.1
2. p is jointly proportional to q and r and p = 12 when q = 8 and r = 3
3. c varies inversely as d and c = 7 when d = 4
4. t varies directly as the square of u and t = 6 when u = 3
5. e varies jointly as f and g and e = 24 when f = 3 and g = 2
6. w is inversely proportional to the cube of x and w is 54 when x = 3
7. h is directly proportional to j and h = 12 when j = 8 8. a is jointly proportional with the square of x and the square root of y and a = 25 when x = 5 and y = 9
9. m is inversely proportional to n and m = 1.8 when n = 2.1
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