### Home > INT3 > Chapter Ch1 > Lesson 1.2.2 > Problem1-96

1-96.

Given the points $A (3, 2)$ and $B(-21,0)$, determine:

1. The slope of the line $\overleftrightarrow { A B }$.

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

$\frac{1}{12}$

1. The length of $\overline {AB}$.

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

$\sqrt{580}$

1. The midpoint of $\overline {AB}$.

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

1. An equation of $\overleftrightarrow { A B }$.

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