Alg I BenRev2

Which of the following is a function? 

• A.  I and III only

• B.  II only

• C.  I and II only

• D.  I, II, and III

While on vacation, Jorge and Jackie traveled to a National Park. They were impressed by the differing elevations at the viewpoints along the road. The graph describes the elevations for several viewpoints in terms of the time since they entered the park. What is the domain?

• A.  0 ≤ t ≤ 9300

• B.  7100 ≤ t ≤ 9300

• C.  33 ≤ t ≤ 7100

• D.  0 ≤ t ≤ 33

A plumber charges $65 per hour plus a $100 inspection fee. The cost for x hours of work is given by the function f(x) = 65x+100. 
What is the dependent variable for this function?

• A.  Charge per hour

• B.  Number of hours

• C.  Total Cost

• D.  Inspection Fee

H(t) = 5t + 8.

Find H(10) and H(27)

• A.  50 and 35

• B.  58 and 143 

• C.  43 and 127

• D.  34 and 172

The initial weight of a container is 6.2 pounds. As water is added to the container, the weight increases at a rate of 0.6 pounds every 2 minutes. Which function models the weight of the container as a function of time? 

• A.  0.6t + 6.2

• B.  6.2t + 0.6

• C.  0.3t + 6.2

• D.  6.2t + 0.3

What is the range of the function graphed on the grid? 

• A.  {x| x = -2, 2, 4}

• B.  {y| -3 ≤ y ≤ 4}

• C.  {x| -2 ≤ x ≤ 4}

• D.  {y| y = -3, 0, 4}

What is the slope of the following equation: y – 3 = -4(x + 10)

• A.  m = -3

• B.  m = -4

• C.  m = 4

• D.  m = 10

On a car trip, Theresa kept a record of her gas mileage as shown in the table.  What is the equation of the situation.  

• A.  y = 46x

• B.  y = x + 46

• C.  y = x + 23

• D.  y = 23x

The trade-in value, V, of a certain model of automobile can be determined using the function, V(x) = 25,000 – 0.25x, where x is the mileage. Which of the following statements is the best interpretation of the slope? 

• A.  The value of the car increases as the mileage increases

• B.  The selling price of the automobile when it is new is $25,000.

• C.  The trade in value of the automobile decreases $4 for every additional mile driven

• D.  The trade in value of the automobile decreases $1 for every additional 4 miles driven

Interpret the y-intercept:

• A.  The time is 3.5 minutes when a person started descending a 10,000 feet mountain 

• B.  The initial altitude of a mountain was 10,000 when a person started descending. 

• C.  The initial time was 0 when the person started descending from a 10,000 mountain

• D.  The person reached the bottom after 3.5 min