What is the explicit rule for the sequence? 10.5, 9, 7.5, 6, 4.5, 3, ...

an=12−1.5n

an=12.5−1.5n

an=11−1.5n

an=12+1.5n

9514 1404 393

  an=12−1.5n

Step-by-step explanation:

The first term is 10.5.

The common difference is ...

  9 - 10.5 = -1.5

The n-th term can be described by ...

  an = a1 +d(n -1)

  an = 10.5 -1.5(n -1) = 10.5 -1.5n +1.5 . . . . eliminate parentheses

  an = 12 -1.5n

found it xd it ok yt

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,