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Determine whether a linear function is increasing or decreasing
Grade Level
SAT Prep
M056 Determine whether a linear function is increasing or decreasing
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The function r is defined by r(x) = -2(4 - 3x) + 1. Which statement is true?
A
Constant; the x-term becomes 6x.
B
Cannot be determined; the expression can be expanded to reveal the slope.
C
Decreasing; the negative outside factor combines with -3x to make a positive slope.
D
Increasing; expanding gives r(x) = 6x - 7.
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