__________ 1. What is f(x) = x

2 + 2x − 1 when written in vertex form?

a. f(x) = (x + 1)
2 + 1
b. f(x) = (x + 1)
2 + 2

c. f(x) = (x + 1)
2 − 1
d. _____________

__________ 2. What is f(x) = −3(x + 2)

2 + 2 when written in standard form??

a. f(x) = −3x

2 + 12x − 10

b. f(x) = −3x

2 − 12x + 10

c. f(x) = 3x

2 + 12x + 10
d. _____________

__________ 3. What is the equation of the quadratic function expressed in general form given the
vertex (−3, 2) and a = 5?
a. f(x) = 5x

2 + 30x − 47

b. f(x) = 5x

2 − 30x + 47

c. f(x) = 5x

2 + 30x + 47
d. ________________

__________ 4. What is the vertex of f(x) = (x − 2)
2 + 4?

a. (2, 4)
b. (−2, 4)

c. (−2, −4)
d. _________________
__________ 5. What is the coordinate of the vertex of the equation y = 2x

2 + 4x − 3?

a. (1, −5)
b. (−1, −5)

c. (−1, 5)
d. _________________
__________ 6. How does the area of a triangle vary as its height and base?
a. Directly
b. Inversely

c. Jointly
d. _________________

__________ 7. Which is the equation for the cost c that varies directly as the number n of pens
bought?
a. cn = k
b. c = kn

c. c =
k
n
d. _________________

__________ 8. What kind of variation is applied when a car travels a distance d kilometers in t in
hours? The formula relates d to t is d = kt
a. Directly
b. Inversely

c. Jointly
d. _________________

__________ 9. Which is an example of power variation?
a. y =
3
2
x
b. y =
2
5
x
2

c. y
2 = kx
d. _________________
__________ 10. What happens to x when y is doubled in the equation x = 4y?
a. x remains the same
b. x is halved

c. x is doubled
d. _________________
Here 20 points ASAP.