The linear model, y equals . 1967 x plus 15.66 comma provides the approximate enrollment, in millions, between the years 2003 and 2012, where x equals 0 corresponds to 2003, x equals 1 to 2004, and so on, and y is in millions of students.

The number of students enrolled in 2012 is approximately 17,400,000 to the nearest 100,000

Step-by-step explanation:

y = 0.1967x + 15.66

x = years since 2003

y = number of students enrolled in millions

In 2012, x = 9 (2012 is 9 years from 2003)

y = 0.1967(9) + 15.66

y = 1.7703 + 15.66 = 17.4303 millions = 17,430,300 = 17,400,000 to the nearest 100,000

2

step-by-step explanation:

1+1=2

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2