Modeling Functions

• 1

• 2

• 3

• 4

What represents Growth/Decay on f(x)=a⋅b^x ?

• x

• a

• b

The owner of a small computer repair business has one employee who is paid an hourly rate of $22.  The owner estimates his weekly profit using the function P(x) = 8600 - 22x.  In this function, x represents the number of

• computers repaired per week

• hours worked per week

• customers served per week

• days worked per week

Bob has $150 in his savings account and saves $40 per month. Which equation represents the amount Bob has in his account after x months?

• y = 150 + 40

• y = 40x + 150

• y = 150x + 40

The graph represents the height of a burning candle.  What is the meaning of the slope?

• the time it takes to burn the entire candle

• the change in the height of the candle each hour it is burning

• the different heights of the candle

• the original height of the candle

Adrianna has $20 in her savings account. Each week she will add $5 to it. Which equation represents this situation?

• y=25x

• y=20x+5

• y=5x+20

• y=5x

A holiday meal costs $12.50 a person plus a delivery fee of $30.  Which equation represents the amount a holiday meal costs, including delivery, for x people?

• y = 30 + 12.5x 

• y = 12.5 + 30

• y = 12.5 + 30x

Which of the following would be graphed as a horizontal line?

• y = -4

• x = 7

• y = 3x-4

• None of the above

What does "m" represent in y=mx+b?

• y-intercept

• slope

• macaroni

• nothing

d=125 + 80n models the amount of money (d) in the register after selling n tickets. What is the meaning of 80 in the equation? 

• The price of each ticket is $80

• 80 tickets have been sold

• There was $80 dollars in the register before any tickets were sold

• There are only 80 tickets that can be sold