I am trying to find the slope and y-intercept of an equation. I have THREE x values and THREE y values. How do you do it? Help!

My Name: Casey
Grade: 12

Thank you,

Hi Casey,

If you have two points on a line then you can find the slope in the usual way; the slope is the difference in the y-values divided by the difference in the x-values. (Make sure that you perform both differences in the same order.) If you have three points on the line you can find the slope using any pair of the two points. Try it! Take two of the three points and find the slope. Now take a different pair from the three points and find the slope again. You should get the same value.

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