Question

how do you find the slope of the line passing through a pair of points? example (-15, 10) and (20, -5) ??

Answer 1

from -15 to 20 is right 35 units
from 10 to -5 is down 15 units
slope is \(-\frac{15}{35}=-\frac{3}{7}\)

Answer 2

or if you'd like a formula... \[\Large m = \frac{y_2 - y_1}{x_2 - x_1}\] where m = slope
\(y_2\) means second y coordinate
\(y_1\) means first coordinate
\(x_2\) means second x coordinate
\(x_1\) means first x coordinate

Answer 3

thanks so much, really helped!