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# Need some help with this math question?

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

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

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

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

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

Link to a picture of the function table: https://imgur.com/a/eYyT8

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Thanks to anyone who helps.

Feb 28, 2018
edited by Jaleco  Feb 28, 2018
edited by Jaleco  Feb 28, 2018

#1
+18138
+2

Year 2      28.4

Year 4      29.2      29.2-28.4 = .8

the winning time increased by  .8 sec/2 yr = .4 sec per year

A No

B  No

C No

d  Yes

Feb 28, 2018

#1
+18138
+2

Year 2      28.4

Year 4      29.2      29.2-28.4 = .8

the winning time increased by  .8 sec/2 yr = .4 sec per year

A No

B  No

C No

d  Yes

ElectricPavlov Feb 28, 2018