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20 September, 20:01

Is the relationship shown by the data linear? If so, model the data with an equation. x y 1 - 4 7 - 7 13 - 10 19 - 13

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  1. 20 September, 20:56
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    You can see that there is a proportional relationship between X and Y because every 6 of X decreases 3 in Y. In that way you can say is a linear relationship and you can construct a linear equation: Now, to calculate the equation you use: (Y - y1) = y2 - y1 (X - x1) x2 - x1 Let's peek two pairs (1,-4) and (7,-7) (Y - (-4)) = (-7 - (-4)) (X - 1) (7 - 1) Y + 4 = - 3 (X - 1) 6 If you want to express the equation as aX + bY + C = 0 Y + 1/2 X + 7/2 = 0 If you want to express the equation as Y = ax + b Y = - 1/2X - 7/2
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