Interpreting Parabolas

Is the following parabola concave up or concave down?

• Concave down

• Concave up

• Neither

How can you tell whether a parabola is facing up or facing down by looking at the equation?

• The vertex tells you the direction of the opening

• The value of "a" tells you the direction of the opening.

• All parabolas open upward

• All parabolas open downward

If the a value is positive in the equation of y = ax² + c, which direction does the graph open?

• up

• down

• left

• right

If the a value is negative in the equation y = ax² + c , which direction does the parabola open?

• up

• down

• left

• right

What is the y-intercept of the parabola y = 5x² - 3

• 5

• 3

• - 3

• -5

What is the y-intercept of the parabola?

• -4

• 4

• -3

• 0

The graph of y = x² + 1 could be?

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What is the equation of the following graph?

• y = 2x²

• y = x² + 2

• y = x² - 2

• y = - 2x²

Which equation will result in the parabola being a narrower graph?

• y = 2x² + 1

• y = 7x² - 1

• y = 0.5x² + 1

• y = x²

Which of the following graphs could be y = 5x² + 1?

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