The force, P newtons, required to keep an object moving at a speed, V metres per second, was recorded. P 126 178 263 398 525 724 V 1.86 2.34 2.75 3.63 4.17 4.79 If the law connecting P and V is of the form V = apk, where a and k are constants, apply the method of least squares to obtain the values of a and k that give the best fit to the given set of values.