Question

On what interval(s) of x is f(x) increasing?

On what interval(s) of x is f(x) decreasing?


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Answer 1

Increasing → (-∞, -0.5)

Decreasing → (-0.5, ∞)

Explanation:

From the picture attached,

Vertex of the parabola represents the highest point of the curve of a quadratic function 'f'.

Left part from the vertex is increasing and the right side is increasing.

x-coordinates of the vertex,

x = -0.5

Therefore, graph of the function is increasing in the interval (-∞, -0.5)

And decreasing in the interval (-0.5, ∞).