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30 March, 14:16

The average rate of change of f (x) = 3x+9 is 9. true or false?

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  1. 30 March, 18:11
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    The rate of change is the slope.

    f (x) is the same as y ...

    f (x) = 3x + 9 ... y = 3x + 9 ... and in y = mx + b form, the rate of change (slope) can be found in the m position.

    y = mx + b

    y = 3x + 9 ... so the slope or rate of change is 3 ... not 9 ... so answer is false
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