Question

Please help me. I cannot fail this test again. I'll reward and fan. Thanks.

Answer 1

1. The value, V(m), of a comic book m months after publication has a average rate of change of –0.04 between m = 36 and m = 60. Which statement must be true?
a) The value of the comic book decreased by a total of $0.04 between m = 36 and m = 60.
b) The value of the comic book increased by a total of $0.04 between m = 36 and m = 60.
c) The value of the comic book decreased by an average of $0.04 each month between m = 36 and m = 60.
d) The value of the comic book increased by an average of $0.04 each month between m = 36 and m = 60.

2. Maria created a graph of B(t), the temperature over time. For the interval between t = 3 and t = 7, the average rate of change in her graph of B(t) is 8. Which statement must be true?
a) The temperature was 8 degrees higher when t = 7 than when t = 3.
b) The temperature was 8 times higher when t = 7 than when t = 3.
c) The temperature was 32 degrees higher when t = 7 than when t = 3.
d) The temperature was 2 degrees higher when t = 7 than when t = 3.

3. A parking garage charges $5.50 to park for 4 hours and $7.75 to park for 7 hours. If the cost is a linear function of the number of hours parked, what is the cost to park for 3 hours?
a) $2.25
b) $2.50
c) $3.25
d) $4.75

4. Which function has an inverse that is also a function?
a) {(–1, –2), (0, 4), (1, 3), (5, 14), (7, 4)}
b) {(–1, 2), (0, 4), (1, 5), (5, 4), (7, 2)}
c) {(–1, 3), (0, 4), (1, 14), (5, 6), (7, 2)}
d) {(–1, 4), (0, 4), (1, 2), (5, 3), (7, 1)}

5. Which of the following is an odd function?
a) f(x) = x3 + 5x2 + x
b) √6
c) f(x) = x2 + x
d) f(x) = –x

6. Which function has an inverse that is also a function?
a) {(–4, 3), (–2, 7), (–1, 0), (4, –3), (11, –7)}
b) {(–4, 6), (–2, 2), (–1, 6), (4, 2), (11, 2)}
c) {(–4, 5), (–2, 9), (–1, 8), (4, 8), (11, 4)}
d) {(–4, 4), (–2, –1), (–1, 0), (4, 1), (11, 1)}a)

7. If y varies directly as x, and y is 6 when x is 72, what is the value of y when x is 8?
a) 1/9
b) 2/3
c) 54
d) 96

8. Which phrase includes “being equal to 50”?
a) at most 50
b) fewer than 50
c) exceeds 50
d) below 50

9. Which function has an inverse that is also a function?
a) g(x) = 2x – 3
b) k(x) = –9x2
c) f(x) = |x + 2|
d) w(x) = –20

10. If m < 0 and b > 0, the graph of y = mx + b does not pass through which quadrant?
a) Quadrant I
b) Quadrant II
c) Quadrant III
d) Quadrant IV

11. Which statement verifies that f(x) and g(x) are inverses of each other?
a) f(g(x)) = x
b) f(g(x)) = x and g(f(x)) = –x
c) f(g(x)) = g(f(x)
d) f(g(x)) = x and g(f(x)) = x

12. The height in feet, h, of a model rocket t seconds after launch is given by the equation h(t)=3+70t-16t^2. The average rate of change in h(t) between t = 1 second and t = 3 second is 6. What does the average rate of change tell you about the rocket?
a) The rocket is traveling six times as fast when t = 3 than it is when t = 1.
b) The rocket is at a greater height when t = 3 than it is when t = 1.
c) The rocket is 6 feet higher above the ground when t = 3 than it is when t = 1.
d) The rocket is traveling at a constant rate of 6 feet per second between t = 1 and t =

Answer 2

12. The height in feet, h, of a model rocket t seconds after launch is given by the equation h(t)=3+70t-16t^2. The average rate of change in h(t) between t = 1 second and t = 3 second is 6. What does the average rate of change tell you about the rocket?
a) The rocket is traveling six times as fast when t = 3 than it is when t = 1.
b) The rocket is at a greater height when t = 3 than it is when t = 1.
c) The rocket is 6 feet higher above the ground when t = 3 than it is when t = 1.
d) The rocket is traveling at a constant rate of 6 feet per second between t = 1 and t = 3.

Answer 3

Having all of these questions might be overwhelming to some people. You should try asking one question at a time. =)

Answer 4

Okay, will do!