1. Sketch a graph of the situation.
The amount of milk in your container over one lunch period

2. Determine if the relation is a function
Determine if the relation is a function. If it is, state the domain and range.
(-2, 5), (8, 6), (3,12), (5,6), (5, 0)
Not a function, one of the domain values (5) is paired with 2 range values!

3. Determine if the relation is a function
Determine if the relation is a function. If it is, state the domain and range.

4. Using the domain (-2,-1, 0, 1, 2) graph the function
Using the domain (-2,-1, 0, 1, 2) graph the function. Then identify the type of function.
f(x) = 1.5x – 3 x y -2 -6 -1
-4.5 -3 1
-1.5 2
I helped out, you will have to do the table on your own on the test!
This should graph a line!!!

5. Using the domain (-2,-1, 0, 1, 2) graph the function
Using the domain (-2,-1, 0, 1, 2) graph the function. Then identify the type of function.
f(x) = −𝑥

6. Write a function rule to describe the situation.
The cost in dollars of printing dollar bills when it costs 3.8 cents to print a dollar bill.
f(x) = .038x

7. Write a function rule to describe the situation.
The amount of money you earn mowing lawns at $15 per lawn.
F(x) = 15x

8. Write a function rule to describe the situation.
The profit you make selling flowers at $1.50 each when each flower costs 80 cents.
F(x) = .70x because you need to subtract .80 from 1.50 to see you much you make!

9. Write a function rule for the table.x y 1 3 2 5 -3 -5

10. Write a function rule for the table.x y 1
-4.5 -1
4.5 2 -9

11. Describe a situation that could be modeled by the equation y= 5x

12. The price of a turkey depends on its weight. Suppose turkeys sell for $.59 per pound.
Write a rule to describe the function.
What is the price of a 14 lb. turkey?
If you had $10 to buy a turkey, how big a turkey could you buy?
a. y = .59x
b. (.59)(14)= $8.26
c. 10=.59x
x= 16.9lbs

13. Write an equation of the direct variation that includes the point.
(2,2)
y = x

14. Write an equation of the direct variation that includes the point.
(-8, -4)

15. Write an equation of the direct variation that includes the point.
(-5, 3)

16. Determine whether the graph is direct variation, if yes, then write an equation for the graph.
Yes, y = 1/4x

17. Determine whether the graph is direct variation, if yes, then write an equation for the graph.

18. The plumbing amount of water dripping from a leaky faucet varies directly with time. If water drips at a rate of 5 mL/min, how much water drips in 30 minutes?

19. What’s the common difference? And find the next 3 terms.
-55, -50, -45, …
D = 5, -40, -35, -30

20. What’s the common difference? And find the next 3 terms.
1.7, 2.7, 3.7,…
D = 1 4.7, 5.7, 6.7

21. Find the fifth term.
A(n) = 2 + (n – 1) (-2.5)

22. Find the fifth term.
A(n) = -9 + (n – 1)3 3

23. Find the constant of variation for each inverse variation.
y = 5 when x = 6
K = 5/6

24. Find the constant of variation for each inverse variation.
y = 78 when x = 0.1
K = 780

25. Is the sequence arithmetic? Justify answer
128, 64, 32, …

26. Is the sequence arithmetic? Justify answer
3, 3.25, 3.75, …

27. Direct or inverse variation? Explain.
The $45 cost of a dinner at a restaurant is split among several people.
Inverse because the more people that there are the smaller the bill

28. Direct or inverse variation? Explain.
You buy some books for $18 each.
Direct, the more books you buy the higher the cost

29. Define Function.
A relation were each domain value is paired with exactly 1 range value…no repeating x values

30. Define Domain and Range
Domain = input= x values
Range = out put = y values