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Mathematics 7 Online
OpenStudy (anonymous):

Please help fast please! No questions just help!! A school record in a certain race in 1960 was 3.8 minutes. In 1980 the school record in the same event was 3.65 minutes. Use a linear equation to predict the school record in 1990. Choices are. 3.5 minutes or 3.95 minutes or 33.5 minutes

OpenStudy (anonymous):

The slope (time) decreases .15 minutes every 20 years. So in 10 years, it should decrease .075. 3.65 - .075 = 3.575...

OpenStudy (anonymous):

So the answer is 3.95?

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