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Jenn determined that the graph of the quadratic funtion f(x) =x^2 -9 has two x-intercepts. do you agree with her? why or why not?

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4 votes

Answer:

Jenn is correct, as the function has two x-intercepts, at x = -3 and x = 3.

Explanation:

x-intercepts of a function:

The x-intercepts of a function are the values of x for which f(x) = 0.

In this question:


f(x) = x^2 - 9

x-intercepts:


x^2 - 9 = 0


x^2 = 9


x = \pm √(9)


x = \pm 3

Jenn:

Jenn is correct, as the function has two x-intercepts, at x = -3 and x = 3.