The data point 6 is inserted into the data set 3, 3, 4, 5, 7, 7, and 13.
2 answers:
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First, you need to find the slope of the line. You can use this with the slope formula, 
, where the x's and y's are the given coordinates.
Plug in the coordinates
Subtract
Divide
-3
Now, plug the slope (m) and one pair of coordinates, I'll use (-2, 11), into point-slope form,
.
Plug in the values
y - 11 = -3 (x - (-2) Cancel out the double negative
y - 11 = -3 (x + 2)
-3
Now, plug the slope (m) and one pair of coordinates, I'll use (-2, 11), into point-slope form,
y - 11 = -3 (x - (-2) Cancel out the double negative
y - 11 = -3 (x + 2)