Question 811130: A gas station sells 4820 gallons of gas on a day when they charge $1.35 per gallon, whereas they sell 3937 gallons on a day that they charge $1.40 per gallon. Find a linear function that expresses gallons sold as a function of price.
Directions says: solve the problem
Answer by TimothyLamb(4379)   (Show Source):
You can put this solution on YOUR website! the question gives you two data points:
(1.35, 4820) (1.40, 3937)
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plug the xy pairs into the two-point form:
y - y1 = ( (y2 - y1)/(x2 - x1) )(x - x1)
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or use this linear equation solver:
https://sooeet.com/math/linear-equation-solver.php
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copy and paste the list of xy pairs like so: 1.35 4820 1.40 3937
in the two-point input box of the solver, and click the Graph button.
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the slope is: -17660
the y-intercept is: 28661
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the equation is: y = -17660x + 28661
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Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
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Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
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