### Home > A2C > Chapter 12 > Lesson 12.1.1 > Problem12-22

12-22.
1. Given the points A (3, 2) and B (−21, 0), determine each of the following. Homework Help ✎

1. The slope of the line .

2. The length of .

3. The midpoint of .

4. An equation of .

$\frac{(0) - (2)}{(-21) - (3)}$

$\frac{1}{12}$

$\sqrt{(-21-3)^2+(0-2)^2}$

$\sqrt{580}$

Take the average of the x-values, and of the y-values.

Use the slope you found in part (a) to find the y-intercept and write an equation.