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1. A company installs underground cables at a cost of $\$300$ for the first $30$ feet and $\$6$ per foot after. Express the cost $C$ in terms of the lengths of table $L$ (for $L>30$ ft). What is the cost of $40$ feet of cable?

2. Sketch a picture of "all points whose $y$-coordinate is $2$".

3. What is the $x$-coordinate of all points on the $y$-axis?

4. Draw a picture of all points whose $x$-coordinate is less than or equal to $8$.

5. Graph the function $f(x)=x^3$ by plotting four points: one for $x=-1$, one for $x=0$, one for $x=1$, and one for $x=2$.

$x$ | $f(x)$ |

$-1$ | $(-1)^3=-1$ |

$0$ | $0^3=0$ |

$1$ | $1^3=1$ |

$2$ | $2^3=8$ |