In 1960, the world record for the men's mile was 3.91 minutes. In 1980, the record time was 3.81 minutes.
a. Write a linear model that represents the world record (in minutes) for the men's mile as a function of the number of years, t, since 1960.
y= ()
b. Use the model to estimate the record time in 2000 and predict the record time in 2020.
2000:
() minutes
2020:
() minutes
that does not work in big ideas math algebra
y=-0.005t+3.91
ACTUAL ANSWER!
y=-0.005t+3.91
2000: 3.71
2020: 3.61
A. -0.005t+3.91
B. 3.71
3.61
answers 2
Calculating Percent Change and Final Amounts?
gamer
What is the real answer!!!!!!!!!!!!!
y= -0.005t + 3.91
2000: 3.71 minutes
2020: 3.61 minutes
The answer to y is not -0.005t+3.91
in 20 years, the time decreased by 0.1 minutes.
So, the slope of the line is -0.1/20 = -0.005
So, since y(0) = 3.91,
y = 3.91 - 0.005x
Now use that for part (b)