Question 969411
 Complete the equation for the linear function whose graph contains the point (7,8) and has a slope of -1.2
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Form of the equation: y = mx + b
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You are given that y = 8 when x = 7.
And you are given that m = -1.2
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Substitute for those letters and solve for "b"::
8 = -1.2*7 + b
8 = -8.4 + b
b = 8 + 8.4 = 16.4
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The answer you want is::
y = -1.2x + 16.4
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Hope that helps.
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If your son/daughter says "That is not the
way we do it in class", let me know, as there
are several methods being taught these days.
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Cheers,
Stan H.
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