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24 March, 09:12

What is the equation of a line that passes through (7,8) and has a slope of - 3

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  1. 24 March, 10:09
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    Y = mx + b

    m = slope = - 3

    y = - 3x + b

    We need to find b, so plug 7 for x and 8 for y

    8 = - 3*7 + b

    8 = - 21 + b

    Add 21

    29 = b

    So the equation is y = - 3x + 29.
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