Quadratics: Features of Parabolas/Solving by Graphing

Which graph is a parabola?

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Tags

CCSS.HSF-IF.C.7A

Which equation would give the graph of a parabola?

• y = 2x - 3

• y = 3*2^x

• y = x² + 2x+ 4

Which of the following equations matches standard form of a quadratic?

• ax + by = c
• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

Does the following parabola open up (has a minimum) or open down (has a maximum)?

• opens up (has a minimum)

• opens down (has a maximum)

• Neither

How can you tell whether a parabola is opening up or opening down by looking at the equation y=ax²+bx+c?

• 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 +bx+ c, which direction does the graph open?

• up

• down

• left

• right

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

• up

• down

• left

• right

Which letter in the equation y = ax² +bx + c represents the y-intercept?

• a

• b

• c

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

• 5 .... or as an ordered pair it is (0, 5)

• 3 .... or as an ordered pair it is (0, 3)

• - 3 .... or as an ordered pair it is (0, -3)

• -5 .... or as an ordered pair it is (0, -5)

What is the y-intercept of this parabola?

• (−1, 3)
• (−3, 11)
• (−2, 5)
• (0, 5)

Tags

CCSS.HSF-IF.C.7A