What is the best equation for the line of best fit for the data set? yˆ=−3x+15 yˆ=−13x+15 yˆ=−3x+2 yˆ=−13x+2

For this case, the first thing to do is to observe the cut points with the y axis and the x axis.
 We have then that for the following equation:
 y = -3x + 15
 The cut points are:
 Axis x:
 0 = -3x + 15
 3x = 15
 x = 15
 Axis y:
 y = -3 (0) +15
 y = 0 + 15
 y = 15
 Therefore, the line that best approximates the data is:
 y = -3x + 15
 
 y = -3x + 15

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