1.Suppose that the function f(x) = 5x + 3 represents the number of cars that drive by in x minutes. How many cars will drive by in 10 minutes?
a. 80
b. 53
c. 50
d. 35
2. Buses on your route runs every 8 minutes from 7:00am to 11:00am. You arrive at the bus stop at 8:19am. How long will you wait for a bus?
a. 1 minutes
b. 3 minutes
c. 7 minutes
d. 8 minutes
3. What is the domain of the function {(-1,1),(0,0),(1,2)}?
a. {-1,0,1}
b. {-1,0,1,2}
c. {0,1,2}
d. {(-1,1),(0,0),(1,2)}
4. The ordered pairs (1,3),(2,9),(3,27),(4,81)and (5,243)represents a function. What is a rule that represents this function.
a. y = x^3
b. y = 3x
c. y = 3^x
d. y = x + 2
5. The ordered pairs (1,8),(2,16),(3,24),(4,32)and (5,40)represents a function. What is a rule that represents this function.
a. y = x^8
b. y = 8^x
c. y = 8x
d. y = x + 8
6. Suppose yogurt is on sale for $0.50 a piece, and you have a coupon for $0.30 off your total purchase. Write a function rule for the cost of n yogurts. How much would 20 yogurts cost?
a. C(n) = 0.5n - 0.3; $9.70
b. C(n) = 0.3n - 0.5; $5.50
c. C(n) = 0.2n; $4.00
d. C(n) = 0.5n; $10.00
7. The function b(n) = 6n represents the number of light bulbs b(n) that are needed for n chandeliers. How many light bulbs are needed for 15 chandeliers.
a. 90
b. 2
c. 96
d. 80
8. Tell whether the sequences is arithmetic. If it is, what is the common difference? 2,7,13,20...
a. yes;5
b. yes;6
c. yes;2
d. no
10 answers
b or c
a
c
c
b
c
a
d
Why aren't the answers numbered like the questions?
1 answer