1.The braking distance of a car is directly proportional to the square of its speed. When the speed is p metres per second, the braking distance is 6m. When the speed is increased by 300%, find
a)an expression for the speed of the car
b)the braking distance
c)the percentage increase in the braking distance
for 1(a), what i tried to do was,
let braking distance be d, speed be s and constant be k.
speed increased by 300%,
this doesn't seem right..........==
for question2, is there a way to solve it without drawing the graph??