Question

The winning time for the men's 400-meter race in each of the Olympic Games from 1976 to 1996 can be modeled by the equation y = −0.054x + 44.54 , where x is the number of years after 1976 and y is the winning time in seconds. If the relationship continues, which equation could be used to predict the winning time in the year 2020?

Answer 1

D. y = −0.054(44) 44.54

Explanation:

The difference in years from 1976 to 1996 is 20 years

But from 1976 to 2020 the years would be 44

So here put the value of x as 44

Therefore the equation that could be used for predict the winning time for the year 2020 is y = −0.054(44) 44.54

Hence, the correct option is d.

ANd the rest of the options are incorrect