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Question 284045: I need to make a prediction on a line graph for the following problem. If the speed of a vehicle is 40 the gas mileage is 28, speed 45 gas mileage is 25, speed is 50 gas mileage is 21, speed is 55 gas mileage is 18, speed 60 gas mileage is 16. I need to make the prediction for 65 mi/h. My formula is by dividing the differences between the speeds (3,4,3,2) and divide by 4 I came up with 13 mph as the prediction. Is this correct? Please advise. Thank you.
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! consider speed as x and mileage as y
find an equation for a line with those points
hint:
(y-y)/(x-x)=m slope
slope intercept form
y=mx+b
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