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16 questions
Which is the vertex of y = x2+ 16x + 71 ?
V(-8, 7)
V(-8, 3)
V(8, 10)
V(16, -2)
Find the y-intercept y = x2 - 6x + 5
(0, 8)
(0, - 6)
(5, 0)
(0, 5)
Find the y-intercept of f(x) = 2x2 - 2x + 1
(1,0)
(-2,0)
(0,1)
(0, -1)
How do you know if a parabola has a minimum?
When ‘a’ is positive there is a minimum
When ‘a’ is negative there is a minimum
When all the numbers in the equation are negative there is a minimum
When all the numbers in the equation are positive there is a minimum
What is the equation for axis of symmetry?
y = 3
x = 3
x = 5
x = 1
How can you tell whether a parabola opens up or opens 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
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