Exercise 91 Page 344

To determine the $x\text{-}$ and $y\text{-}$intercepts of a line, we need to substitute $0$ for one variable, solve, then repeat for the other variable. In this case, we haven't been given an equation, so we will need to use the given points to write one.

Writing the Equation

The quickest way to write an equation, given two points, is by using the point-slope form. An equation in point-slope form follows a specific format. In this form, $m$ is the slope and the point $(x_1,y_1)$ lies on the graph of the line. To create our equation, we can use either of the given points for $x_1$ and $y_1$ as well as the slope. To calculate the slope we will use the Slope Formula.