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30 March, 17:24

A function h (x) = -5/7x-3. By how much h (x) will decrease/increase, if x decreases by 21.

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  1. 30 March, 17:53
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    increase by 15

    Step-by-step explanation:

    We know the rate of change of h (x) is given by the coefficient of x, - 5/7. This means any change in x will be reflected as a change in h (x) by - 5/7 times the amount of the change.

    Here, we're talking about a change in x of - 21, so the change in h (x) will be ...

    (-5/7) · (-21) = 5· (21/7) = 15

    The positive sign means the value of h (x) will increase by 15.
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