MTHH 022 Pinecrest Prepatory Pre Alegebra Functions Questions

I’m working on a algebra practice test / quiz and need an explanation to help me study.

1. Is this relation a function, {(–5, 7), (–2, –1), (0, 3), (4, 7)}?

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2. Is this relation a function, {(–8, –4), (–2, 0), (1, 3), (–2, 6)}?

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3. Which of the following ordered pairs is a solution for the equation y = 2x + 7?

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4. Which of the following ordered pairs is a solution for the equation y = –3x – 4?

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5. What is the slope of the line that goes through the points of the pair
T(0, 5), U(–3, –2)?

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6. What is the slope of the line that goes through the points of the pair
Q(9, 5), R(4, –5)?

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7. What is the slope of the line that goes through the points of the pair
C(1, 7), D(–8, 7)?

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8. What is the y–intercept of the graph of the equation y = –4x + 7?

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9. What is the y–intercept of the graph of the equation y = –2x?

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10. What is the y–intercept of the graph of the equation y = 1.9?

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11. Which of the following equations gives the same relationship between x and y as
x + y = 6?

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12. Which of the following function equations describes the number of centimeters y as a function of a number of millimeters x? (1 cm = 10 mm)

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13. Which of the following equations shows the relationship of pounds, p, to ounces, z?
(1 pound = 16 ounces)

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14. Which of the following will show a scatter plot with a positive correlation between the number of pages in each magazine and the weight of each magazine?

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15. Which of the following pairs of data sets would most likely have no correlation?

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16. Which of the following ordered pairs is a solution for 4x – 3y = 6?

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17. What is the slope of the line that goes through A(2, 6) and B(8, –1)?

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18. What is the slope of the graph of 3x – 2y = 6?

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19. What is the y–intercept of the graph of 3x – 2y = 6?

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20. What is the solution of the system y = x + 4; y = 4x + 1?

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21. How many solutions does the system 2x + 4y = 10; x + 2y = 10 have?

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22. Using the system x + y = –6; x – y = 2, how are the x–coordinate and the
y–coordinate of the solution related?

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23. Which of the following inequalities has the same solutions as ?

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24. Which of the following describes the graph of ?

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25. You want to spend less than $20 on asparagus and green beans. Asparagus costs $3.00 per pound and green beans cost $0.50 per pound. Let a represent the asparagus and g represent the green beans. Which of the following inequalities models what you can spend?

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26. Which of the following inequalities would have a graph with shading below a dashed boundary line?

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27. Which of the following points is a solution of the system ?

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28. Is this relation a function, {(–4, –6), (–3, –2), (1, –2), (1, 0), (1, 3)}?

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29. Is a person’s age a function of his or her height?

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30. Which of the following points is a solution of the system y = x + 2; y = 2x – 2?

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31. Which relation is a function?

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32. Which graph represents the given equation ?

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33. Which ordered pair is a solution to ?

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34. Which ordered pair is a solution to ?

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35. Which ordered pair is a solution to this system: ?

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36. What is the slope of this line?

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37. What kind of line would be drawn that has a zero slope?

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38. What is the y-intercept of this equation: ?

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39. Which equation matches the coordinates in the table below?

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40. Which is the slope of the line graphed below?

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