$\"\"$

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(a)

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Observe the graph.

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Find $\"\"$ .

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The solid dot indicates the value of the function.

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The value of the function at $\"\"$ is $\"\"$ .

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$\"\"$ .

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Find $\"\"$ .

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The solid dot indicates the value of the function.

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The value of the function at $\"\"$ is $\"\"$ .

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$\"\"$ .

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$\"\"$

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(b)

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Find $\"\"$ .

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$\"\"$ and $\"\"$ . ( From $\"\"$ )

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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(c)

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Find $\"\"$ .

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Substitute $\"\"$ and $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$

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(a) $\"\"$ and $\"\"$ .

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(b) $\"\"$ .

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(c) $\"\"$ .