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person taking a 30 hour review course for a standardized exam average an 620 score.Persons taking a 70 hour course average a score of 769. Find an...

person taking a 30 hour review course for a standardized exam average an 620 score.Persons taking a 70 hour course average a score of 769. Find an equation for the line whose graph depicts this data.

y=3.725x+508.25
y=3.3525x-512.25
y=3.3525x+512.25
y=-3.725x+508.25

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