Answer:
y = -0.25x -2.25
Step-by-step explanation:
You want the line through (7, -4) and (-1, -2) as computed by the TI-84 linear regression function.
Linear regression
The linear regression function makes use of two lists: one for the input values, and one for the output values. The attachment shows how this works.
The equation of the line is y = -0.25x -2.25.
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Additional comment
Spreadsheets also have a linear regression function that will do this same task.
