4. In a quadratic function, if the graph is opens upward the value of a is
a.negative
c. undefined
b. positive
d. zero

5. The following quadratic functions opens downward EXCEPT
a. y = -x + 2x + 3
cy = -3(x - 1)2 - 1
by= (x - 5)2 - 3
d. y = -x - 3x + 2
6. If the graph of a quadratic function opens downward, the value of a is
a. negative
c. undefined
b. positive
d. zero

7. The equation for a basic parabola with a vertex (0,0) is y = x2. If we will change the
value of the variable h and k or the vertex, will the graph also be different?
a. maybe yes
c. sometimes
b. no
d. yes

8. What is the orientation of the graph of the function f(x) = 2(x-1) - 3?
a. opens downward
c. opens to the night
b. opens to the left
d. opens upward
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