Use the checkboxes to graph the functions: $$\begin{aligned} y \amp= x - 2\amp y \amp= x + 1\amp y \amp= (x - 2)(x + 1) \end{aligned}$$

1. What is the degree of the function $y = x - 2\text{?}$
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2. How many roots does it have?
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3. What is the degree of the function $y = x + 1\text{?}$
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4. How many roots does it have?
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5. Expand the function $y = (x - 2)(x + 1)$ by writing it in the form $ax^2 + bx + c\text{.}$
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6. What is the degree of the function $y = (x - 2)(x + 1)\text{?}$
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7. How many roots does it have?
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