In 1990 retail sales at bookstores were about $7.4 billion. in 1997 retail sales at bookstores were about $11.8 billion. write a linear model for retail sales s (in billions of dollars) at bookstores from 1990 through 1997. let t represent the number of year since 1990. then estimate the retail sales at bookstores in 2012.

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= $11.8 + (2012-1997)([$11.8-$7.4][1997-1990])

= $11.8 + 5 ($4.4/7)

= $11.8 4/5 + $22/7

= $59/5 + $22/7

= $413/35 + $110/35

= $523/35 or $14 33/35

answer : SALES IN 2012 WOULD BE $14 33/35 BILLION OR $14.9 3/7

shift 4 units up, and 1 unit left.

it will translate f(x) = 3^x to g(x) = 3^(x+1) + 4

step-by-step explanation:

mean or average is 40.6