### Home > GB8I > Chapter 2 Unit 2 > Lesson INT1: 2.2.2 > Problem2-64

2-64.

Calculate the slope of the line that goes through the points $(−15, 70)$ and $(5, 10)$.

See the Math Notes box in Lesson 2.1.4.

$\text{slope }= \frac{\Delta y}{\Delta x}=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$