Q. 9

  1. P \, \alpha \, Q^2 when p = 9, Q = 6 P = kQ^2 9 = k \times 6^2 k = \frac{9}{36} = \frac{1}{4} P = \frac{1}{4} Q^2

  2. Find Q when P = 25

    P = \frac{1}{4} Q^2 Q^2 = 4P Q^2 = 4 \times 25 Q = \sqrt{4 \times 25} Q = \sqrt{100} Q = \pm 10