The winning times for a race are shown in the table. Which answer describes the rate of change from year 2 to year 4?

- The winning time increased by an average of 0.267 second per year from year 2 to year 4.

- The winning time increased by an average of 0.8 second per year from year 2 to year 4.

- The winning time increased by an average of 0.4 second per year from year 2 to year 4.

- The winning time increased by an average of 0.475 second per year from year 2 to year 4.

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Step-by-step explanation:

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.

i think 5 miles per hour

step-by-step explanation: