Mathematics

Question

What is the rule for the function shown in the table?

Input x -2 -1 0 1 2
Output y -8 -5 -2 1 4

1 Answer

  • Each of the input changes is 1 unit.
    Each of the output changes is 3 units, so the function is linear with a slope of 3.

    The output is -2 when the input is 0, so the function is
    .. y = 3x -2
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