Quadratics Homework Check

Which is an example of a quadratic function?

• $−x^2+4x−5$

• $2x^3+4x−7$

Which table choice matches the quadratic $y=2x^2+4x-3$  ?

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What is a vertex?

• The point where the parabola touches the y-axis.

• The point where the parabola changes direction.

• The point where the parabola touches the x-axis.

What do you call the vertical line that passes through the vertex?

• y-intercept

• axis of symmetry

What would the y-intercept be for this example?

• (0, 0)

• (0, 3)

• (0, 6)

• (6, 6)

Given these points on the parabola, (-2,-3), (-1,-5), (0,-3), and (1,3), which values are part of the domain?

• {-2, -3, -1, -5, 0, -3, 1, 3}

• {-5, -3, 3}

• {-2, -1, 0, 1}

Which graph matches $y=−2x^2+4x−3$  ?

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What is the constant in this equation $y=-2x^2+4x-3$  ?

• -2

• 4

• -3

Do you have a quiz today?

• yes

• no