Perpendicular = opposite sign and reciprocal slope Make equation into y = mx + b Add 3y to both sides 3y + 54 = 3x Subtract 54 3y = 3x - 54 Divide by 3 y = x - 18 The slope is 1 Make it negative and reciprocal = -1/1 = -1
time would be the independent variable as it doesnt depend on the distance. distance is dependant as you need a certain amount of time to get somewhere..