Question

What is the slope of the line between (3, −4) and (−2, 1)?


1

2

−2

−1

Answer 1

The slope \(m\) of the line between \((x_1,y_1)\) and \((x_2,y_2)\) is given by \[m=\dfrac{y_1-y_2}{x_1-x_2}\]

Answer 2

So it'd be -1?

Answer 3

correct

Answer 4

Thanks!

Answer 5

np

Answer 6

note that \[\dfrac{y_1-y_2}{x_1-x_2}=\dfrac{-(y_2-y_1)}{-(x_2-x_1)}=\dfrac{y_2-y_1}{x_2-x_1}\]

So you can do it in either order, just make sure that the \(y_2\) goes with the \(x_2\) and the \(y_1\) goes with the \(x_1\).