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For the function f(x) = x^2 + 3x,a) Find f(-2).b) Is this function linear or quadratic? Justify your answer.c) Will the graph of this function appear as a line or a parabola?

Respuesta :

a) Evaluating the function at x= -2 we get:

[tex]f(-2)=(-2)^2+3(-2)=4-6=-2[/tex]

b) Notice that the given function has the form:

[tex]y=ax^2+bx+c[/tex]

Therefore f(x) is a quadratic function.

c) Since f(x) is a quadratic function its graph is a parabola.

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