Calculus Examples

$f (x) = 8 x^{2} - 9$ , $(1, 7)$

Evaluate $f (x) = 8 x^{2} - 9$ at $x = 1$ .

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Replace the variable $x$ with $1$ in the expression.

$f (1) = 8 {(1)}^{2} - 9$

Simplify the result.

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Simplify each term.

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One to any power is one.

$f (1) = 8 \cdot 1 - 9$

Multiply $8$ by $1$ .

$f (1) = 8 - 9$

Subtract $9$ from $8$ .

$f (1) = - 1$

The final answer is $- 1$ .

$- 1$

Since $- 1$ $\neq$ $7$ , the point is not on the graph.

The point is not on the graph

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