Question

How would you find the slope of the line containing the points P(4, 9) and R(57, 73)?

Answer 1

Answer:

Slope is defined as the difference in the vertical axis divided by the difference in the horizontal axis, going left to right (s = dy/dx).  P has a lesser x co-ordinate, so it will be R - P in this case, giving us (ry - py) / (rx - px):

$s = \frac{{\Delta}y}{{\Delta}x}$

$s = \frac{73 - 9}{57 - 4}$

$s = 64/53$