9 10 11 12 13 14 Study Year 0 1 2 3 4 5 6 7 8 refer to the following information Artic Sea Ice Extent million km 5 98 6 18 6 08 5 59 5 95 4 32 4 73 5 39 4 81 4 22 3 63 5 35 5 29 4 68 4 72 Extent million km 76547 0 a 0 The predicted decrease in extent in millions of square kilometers of Arctic sea ice per year during the period predicted extent in millions of square meters of Arctic sea ice at the end of the nd The function a defined by a t c dt where c and d are constants models the extent in millions of square kilometers of Artic sea ice t years after the start of he study during a period in which the change is pproximately linear What does d represent The predicted total decrease in extent in millions of square kilometers of Arctic sea ice during the period 1 he predicted extent in millions of square ometers of Arctic sea ice at the beginning of period 2 Arctic Sea Ice Extent Over Time 3 6 7 8 9 10 Year A team of research climatologists conducted a 14 year study to determin the change in the area of the Arctic sea covered with ice termed the Ar sea ice extent The graph and table above model the extent a in million square kilometers of Arctic sea ice t years after the study began yer 12 4 5 13 destiny u To date LO 11 12 13 14 am 08 T CATOR ORSIN The rate of decrease of Artic sea ice extent from 7 to Year 10 is nearly constant On this interva of the following best models the extent a in m of square kilometers of Arctic sea ice t years study began A a 5 0 21t B a 7 0 13t C a 10 0 64t D a 15 1 82t Over which time period is the average Arctic sea ice extent the greatest A Year 4 to Year 5 B Year 7 to Year 8 C Year 9 to Year 10 D Year 12 to Year 13