Exercise 28 Page 160

We will graph this equation by finding and plotting its intercepts, then connecting them with a line. To find the $x\text{-}$ and $y\text{-}$intercepts, we will need to substitute $0$ for one variable, solve, then repeat for the other variable.

Finding the $x\text{-}$intercept

Think of the point where the graph of an equation crosses the $x\text{-}$axis. The $y\text{-}$value of that $(x,y)$ coordinate pair is equal to $0,$ and the $x\text{-}$value is the $x\text{-}$intercept. To find the $x\text{-}$intercept of the given equation, we should substitute $0$ for $y$ and solve for $x.$