For the graph of the function, identify the axis of symmetry, vertex and the formula for the function.

Axis of symmetry: x = 0.5; Vertex: (0.5, –1.25); f(x) = x2 + x – 1

Axis of symmetry: x = 0.5; Vertex: (0.5, –1.25); f(x) = x2 – x – 1

Axis of symmetry: x = 0.5; Vertex: (0.5, –1); f(x) = x2 – x – 1

Axis of symmetry: x = –0.5; Vertex: (–0.5, 1.25); f(x) = x2 – x – 1

The answer to your question is the third choice.

Step-by-step explanation:

The axis of symmetry is the dotted red line which is located in x = 1/2

The Vertex is the lowest point of the parabola which is (1/2, -1)

The equation of the function is:

                        (x - h)² = 4p(y - k)

-Substitution

                        (x - 1/2)² = 4p(y + 1)

-We can not know the value of p

                        x² - x + 1/4 = y + 1

Discarding choices, there are two possible answer, the second and the third choices, but because of the Vertex (0.5, -1), i think the right answer is the third choice.

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

135

step-by-step explanation:

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