Solution
x 1 2 3 4
y -2 1 4 7
For this case we can find the slope with two points lets select (1,-2) and (2,1) so we have:
And we can find the intercept with a point for example (2,1) we have:
And then b= 1-6= -5
And the equation would be:
y= 3x-5
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