In a quadratic function, if the graph is opens upwar, the value of a is
a. negative
b.positive
c.undefined
d.zero
the following quadratic functions opens downward except
a. y=-x²+2x+3
b. y=(x-5)²-3
c. y=-3(x-1)²-1
d. y=-x²-3x+2
a. negative
b.positive
c.undefined
d.zero
the following quadratic functions opens downward except
a. y=-x²+2x+3
b. y=(x-5)²-3
c. y=-3(x-1)²-1
d. y=-x²-3x+2
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Answer:
1. b
2. b
Step-by-step explanation:
1. In a quadratic function, if the graph is opens upward, the value of a is positive.
2. only b has a positive leading coefficient or a positive value of a.