Chapter 9.2, Problem 8GP

To determine

To graph : the function by plotting ordered pairs

Explanation of Solution

Given information :

The function is

  $y=x-1$

Graph :

Find the intercepts

Let $y=0$ to find the $x$ -intercept

  $\begin{array}{l}y=x-1\\ x=1-y\\ x=1-0\\ x=1\end{array}$

Since $x=1$ when $y=0$ ,graph the ordered pair $\left(-2,0\right)$ .

Let $x=0$ to find the $y$ -intercept

  $\begin{array}{l}y=x-1\\ y=0-1\\ y=-1\end{array}$

Since $y=-1$ when $x=0$ ,graph the ordered pair $\left(0,-1\right)$ .

Therefore the graph is obtained as

Interpretation : From the above graph it can be observed that that ordered pairs are $\left(-2,0\right)$ and $\left(0,-1\right)$ .