We know form our problem that the third day she biked 20 miles, so we have the point (3,20). We also know that <span>on the eighth day she biked 35 miles, so our second point is (8,35).
To relate our two point we are going to use the slope formula: </span>
We can infer form our points that
, 
,
, and 
. so lets replace those values in our slope formula:
Now that we have the slope, we can use the point-slope formula <span>determine the equation of the line that best fit the set for Maggie’s data.
Point-slope formula: </span>
We can conclude that the equation of the line that best fit the set for Maggie’s data is.
To relate our two point we are going to use the slope formula: </span>
We can infer form our points that
Now that we have the slope, we can use the point-slope formula <span>determine the equation of the line that best fit the set for Maggie’s data.
Point-slope formula: </span>
We can conclude that the equation of the line that best fit the set for Maggie’s data is