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Is f(-2) negative?which values of x is >0which values of x if f(x) =0

Is f(-2) negative?which values of x is >0which values of x if f(x) =0-example-1
User Saerom
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1 Answer

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We know that a function is greater than 0 when the graph of the function is above the x-axis.

Meaning that if the function is below the x-axis the function is taking negative values.

For that reason we can say that:

A) f(-2) is positive because the graph at that point is above the x-axis

B) the function is greater than 0 o values greater than -3 until 5, in interval notation it will be (-3,5]

c) We can say that the function is equal to 0 when x=-3 because at that point the graph is exactly crossing the x-axis

User Elrrrrrrr
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