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anonymous

  • 4 years ago

I don't understand Linear Functions. This is what it states write the rule for the linear function. x y -3 -17 -1 -7 1 3 3 13 using (1,3) and (3,13): m=______=_______=_______ How do I figure this out?

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  1. anonymous
    • 4 years ago
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    y=mx+c where c is the y-intercept and m is the gradient. \[m=\frac{y_2-y_1}{x_2-x_1}\]

  2. anonymous
    • 4 years ago
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    how did you get that? I'm a big dummy lol

  3. anonymous
    • 4 years ago
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    These are the rule to find out the equation of a straight line. All you need to do to find the gradient is plug in the values for the two points.

  4. anonymous
    • 4 years ago
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    ok so if I'm looking at the graphand I'm using 1,3 and 3,13 then the m= what? see I don't get it. When I look at the graph I see where the 1,3 is but I don't get how to make the m= anything

  5. anonymous
    • 4 years ago
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    (1,3) --> (x1,y1) and (3,13) ---> (x2,y2) So \[m=\frac{y_2-y_1}{x_2-x_1}\]\[=\frac{13-3}{3-1}\]\[=\frac{10}{2}\]\[=5\]

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