1.Answer the following for the given quadratic function. f(x) = -2x^2 - 8x - 13

(a) does the graph of f open up or down?
(b) what is the vertex (h,k) of f?
(c) what is the axis of symmetry?
(d) what are the intercepts?
(e) how is the graph suppose to look for this question?
(f) what is the domain of f?
(g) what is the range of f?
(h) on what interval is f increasing?
(i) on what interval is f decreasing?
2. Describe how the graph of h(x) = 1/x + 3 can be obtained from the graph of f(x) = 1/x. Then graph the function h(x).
How can the graph of h(x) = 1/x + 3 be obtained from the graph of f(x) = 1/x?
What is the graph of h(x) = 1/3 + x?

F(x) = -2x^2 - 8x - 13.

a. Down.

b. V(h,k).
h = Xv = -b/2a = 8/-4 = -2.
k = -2(-2)^2 -8(-2) - 13 = -5.

c. X = h = -2.

d. The graph opens downward and k is less than 0. Therefore, there are no
Intercepts(real solutions).

e. The graph opens downward and does not
cross the x-axis.

f.

g.

h. -2 > X = -2.

i. -2 = X > -2.

Use the graph to answer the question.

1. What might the creator of this graph want the reader to conclude? (1 point)
A. The car dealer sold twice as many cars in April as in January.
B, The car dealer sold the most cars in January.
C, The car dealer’s business is expanding very rapidly.
D, The car dealer sold three times as many cars in March as in February.

B. The car dealer sold the most cars in January.

What is one way to make this graph less misleading? (1 point)

Use wider bars for each month.
Start the y-axis at 50 and use an interval of 1.
Use different colors for each month.
Start the y-axis at zero and use an interval of 5 or 10.

Start the y-axis at zero and use an interval of 5 or 10.

The camera shop wants to use the measure of central tendency that expresses how successful

they are in selling cameras. Which measure of central tendency should they choose?
(1 point)
mean
interquartile range
mode
median
Finish Cancel

mean