Sheet #11-9
Name: ______Date: ______
Exponential Functions – Mixed ProblemsAlgebra I Common Core
1 / To slide the graph of the equation two units right, the equation must be altered. What is the new equation?(1) /
(2) /
(3) /
(4) /
2 / How does the graph of , compare to the graph of ?
(1) / Shifted 4 units right and 1 unit up
(2) / Shifted 4 units left and 1 unit up
(3) / Shifted 4 units right and 1 unit down
(4) / Shifted 4 units left and 1 unit down
3 / Which situation could be modeled with an exponential function?
(1) / the amount of money in a savings account where $150 is deducted every month
(2) / the amount of money in Suzy’s piggy bank which she adds $10 to each week
(3) / the amount of money in a certificate of deposit that gets 4% interest each year
(4) / the amount of money in Jaclyn’s wallet which increases and decreases by a different amount each week
4 / Which situation could be modeled by using a linear function?
(1) / a bank account balance that grows at a rate of 5% per year, compounded annually
(2) / a population of bacteria that doubles every 4.5 hours
(3) / the cost of cell phone service that charges a base amount plus 20 cents per minute
(4) / the concentration of medicine in a person’s body that decays by a factor of one-third every hour
/ 5 / Grisham is considering the three situations below.
- For the first 28 days, a sunflower grows at a rate of 3.5 cm per day.
- The value of a car depreciates at a rate of 15% per year after it was purchased.
- The amount of bacteria in a culture triples every two days during an experiment.
(1) / I, only
(2) / II, only
(3) / I and III
(4) / II and III
6W / In a science fiction novel, the main character found a mysterious rock that decreased in size each day. The table below shows the part of the rock that remained at noon on successive days.
Which fractional part of the rock will remain at noon on day 7?
(1) / / (3) /
(2) / / (4) /
7 / Miriam and Jessica are growing bacteria in a laboratory. Miriam uses the growth function while Jessica uses the function
, where n represents the initial number of bacteria and t is the time, in hours. If Miriam starts with 16 bacteria, how many bacteria should Jessica start with to achieve the same growth over time?
(1) / 32
(2) / 16
(3) / 8
(4) / 4
8 / Alicia has invented a new app for smart phones that two companies are interested in purchasing for a 2-year contract. Company A is offering her $10,000 for the first month and will increase the amount each month by $5,000. Company B is offering $500 for the first month and will double their payment each month from the previous month. Monthly payments are made at the end of each month. For which monthly payment will company B’s payment first exceed company A’s payment?
(1) / 6
(2) / 7
(3) / 8
(4) / 9
9W / The function translates to form the function . Describe the transformation.
10 / The function translates to form the function . Describe the transformation.
11 / Yolanda own 4 rabbits. She expects the number of rabbits to double every year.
After how many years will she have 64 rabbits?
Write a function to model this situation.
/ 12W / The table below shows the average yearly balance in a savings account where interest is compounded annually. No money is deposited or withdrawn after the initial amount is deposited.
What is her average rate of change between year 0 and year 10?
Which type of function best models the data?
(1) / Linear function with a negative rate of change
(2) / Linear function with a positive rate of change
(3) / Exponential decay function
(4) / Exponential growth function
13W / Jacob and Jessica are studying the spread of dandelions. Jacob discovers that the growth over t weeks can be defined by the function
. Jessica finds that the growth function over t weeks is . Calculate the number of dandelions that Jacob and Jessica will have after 5 weeks.
Based on the growth from both functions, explain the relationship between and g.