1) The rate of change is most closely related to: a) m = (y2-y1)/(x2-x1) b) slope, a.k.a. rise/run c) the steepness of a line, on a graph; within the domain d) all of the above 2) If you are identifying a rate for miles per gallon, which of these makes the most sense? a) x/y = miles/gallon b) x/y = gallons/mile c) y/x = miles/gallon d) y/x = gallons/mile 3) If you are identifying a rate for feet traveled each second, which of these makes sense? a) x/y = ft./sec. b) x/y = sec./ft. c) y/x = sec./ft. d) y/x = ft./sec. 4) Which of these shows a negative rate of change? a) b) c) d) 5) Which letter(s) show no slope (no miles traveled): a) A & C b) B & D c) C d) E 6) What is the rule of a function? a) each x has only one y b) each y only has one x c) each range has only one domain d) it has x and y values 7) Which of these is not a function? a) b) {(0, 12), (2, 15), (4, 16), (6, 16) c) {(1, -3), (2, -4), (2, -6), (3, -7)} d) 8) I pay $5 to get into the county fair. For each ticket I purchase to go on rides it costs me $3. In T(C) = $5 + $3x: What does x stand for? a) one time fee b) total cost c) cost of tickets d) number of tickets purchased 9) What is the first step when looking at an expression like: (2x2 + 5x - 7) - (x2 - 2x + 3)? a) multiply (2x2 )(x2) b) distribute the negative to (x2 - 2x + 3) c) combine like terms d) subtract: 2x2 - x2 10) What happens to the operation signs when you distribute a negative throughout the expression? a) they stay the same b) positives stay positive and negatives turn positive c) negatives become positive and positives become negative d) you divide

7/8 Math AIS

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