Unit 2 Linear Functions Review – worth 20 points How do you represent and interprect real world situations using linear functions?

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12. In a chemistry experiment, the temperature of a gas, in degrees Celsius, followed this pattern. Which of these expressions describes the pattern? Number of Seconds After Reaction (t) Temperature of Gas (ºC)

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14.The data below shows a puppy’s weight, in ounces, on the day it was born and on the next five days. 3.75, 4.25, 4.75, 5.25, 5.75, 6.25 Which graph shows this data?

15. What is the domain of the relation graphed below?

16.Which relation is also a function?

17.Which table of values represents a function?

18.Which graph represents a function?

19. The coordinate plane below shows the graph of a relation. What is the range of the graph?

20. The graph of a function is shown below. Which value is not in the domain of the function? A.-2 B.-1 C.0 D.2

21.Which relation is also a function?

22.Look at this set of ordered pairs. {(2,4), (3,4), (4,6), (5,6), (6,8), (7,8)} Which statement about the relation above is true?

23.Which graph models the equation 2x + 3y = -6 ?

24. Jazmin is a hairdresser who rents a station in a salon for a daily fee. The amount of money (m) she makes from any number of haircuts (n) a day is described by the linear function m = 45n – 30. Which statement is true?

25.Yolanda saves all the money from a regular baby-sitting job. The money in her savings account is increasing according to the linear equation y = 6x + 50, where x = #of hours worked and y = savings in $. Which table of values matches this equation?

26. The table shows the number of defective batteries identified in different shipments. Which linear equation shows the relationship between the total number of batteries in the shipment and the number of defective batteries?

27. A jet is traveling at 800 kilometers per hour. Which graph best shows the relationship between time and distance traveled for this jet?

28. Quentin is filling a bicycle tire with air. The air pressure started at 20 pounds per square inch (psi), and is increasing by 1.5 psi per second. Which table shows the relationship between time and air pressure?

29. The graph shows how the monthly rent for an apartment changed over time. Which statement about the linear function shown by the graph is true?

30. The Garcia family drives home from a vacation trip. The table of values below shows the relationship between the number of gallons, g, of gasoline their car uses and the distance in miles, d, the car is from home. Which statement is true?

31. The table shows how the temperature of the water in a lake depends of depth. Which graph shows this relationship?

32. A linear equation is graphed on the coordinate plane below. What are the slope and y-intercept of the graphed line?

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36.What is the rate of change shown on the graph below?

37.In which graph does the line have a slope of -2 and a y-intercept of 1?

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39. Two trains are approaching Chicago. The graph shows how each train’s distance to Chicago is changing over time. The slope of the line describing train 1 has slope -60. The slope of the line describing train 2 has slope -50. Which statement best compares the two trains’ expected arrival times in Chicago?

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41. Slices of cheese pizza cost $3 each, and slices of gourmet pizza cost $4 each. A soccer coach will spend a total of $48 on slices of pizza for his team. The equation below shows the relationship between x, the number of slices of cheese pizza, and y, the number of slices of gourmet pizza the coach will buy. 3x + 4y = 48 If the coach does not buy any slices of cheese pizza, how many slices of gourmet pizza can he buy? A. 3 B. 4 C. 12 D. 16