91Ó°ÊÓ

Find the x-intercept and the y-intercept of the graph of each equation. Then graph of the equation.

$39.5x+3y=15$

Write an equation in slope-intercept form for the line that satisfies each set of conditions.

Passes through $\left(3,2\right)$, perpendicular to the graph of $4x-3y=12$

Graph each function. Identify the domain and range.

$h\left(x\right)=\{\begin{array}{l}−1\text{ â¶Ä‰}if\text{ â¶Ä‰}x<−2\\ 1\text{ â¶Ä‰}if\text{ â¶Ä‰}x>2\end{array}$

Determine whether each relation is a function. Write yes or no.

In 2000, Matt had a collection of 30 music CDs. Since then he has given away 2 CDs, purchased 6 new CDs, and traded 3 of his CDs to Kashan for 4 of Kashan’s CDs. Since 2000, what has been the percentage of increase in the number of CDs in Matt’s collection?

$\text{A}.\text{3}\frac{1}{3}\%\text{B.}10\%\text{C.14}\frac{2}{7}\%\text{D.16}\frac{2}{3}\%$

Graph each inequality.

$y<2$

Find the x-intercept and the y-intercept of the graph of $\mathbf{3}\mathbf{x}+\mathbf{5}\mathbf{y}=\mathbf{30}$. Then, graph the equation.

Find the slope of the line that passes through each pair of points.

$\left(1,1\right),\left(3,1\right)$

Complete parts a–c for each set of data in Exercises 4 and 5.

a. Draw a scatter plot.

b. Use two ordered pairs to write a prediction equation.

c. Use your prediction equation to predict the missing value.

Whether you are climbing a mountain or flying in an airplane, the

higher you go, the colder the air gets. The table shows the temperature in the

atmosphere at various altitudes.

State the slope and y-intercept of the graph of each equation.

4. $\mathbf{y}=\mathbf{2}\mathbf{x}-\mathbf{5}$