CHAPTER 6. 1.Rate of Change: The relationship between 2 quantities when one item depends on another. Rate of Change = change in DEPENDENT var change in.

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Presentation transcript:

CHAPTER 6

1.Rate of Change: The relationship between 2 quantities when one item depends on another. Rate of Change = change in DEPENDENT var change in INDEPENDENT var. 2.Slope: m m = y – y = change in y = “rise” x – x change in x “run” Look at the examples on p. 283

i.e. Suppose we wanted to calculate the slope of a line that goes through the points (-3, 2) and (0, 7) Use the slope formula: m = y – y x – x m = 2 – 7 -3 – 0 m = -5/-3 = 5/3 ***MEMORIZE: POSITIVE NEGATIVE ZERO UNDEFINED

*** Please know we could’ve calculated the slope the “opposite” way, and still get the SAME result. i.e. (-3, 2) and (0, 7) Use the formula m = y – y x – x m = 7 – m = 5/3

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