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2 December, 00:17

the equations of two functions are y equals - 21x + 9 + y equals - 24x + 8 which function is changing more quickly and why?

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  1. 2 December, 01:51
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    By "-21x + 9 + y equals - 24x + 8" I'm assuming you meant

    "y = - 21x + 9 AND y equals - 24x + 8." Using " + " to indicate "and" could be confusing.

    We then have the system of linear equations

    y = - 21x + 9

    y = - 24x + 8

    The function with the greater slope is the 2nd: y = - 24x + 8 (with the understanding that we're focusing on the magnitude of the slopes). Thus, it is this function that changes more quickly.
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