Question

In 1989, a movie ticket cost $3.00. In 1999, a move ticket costs $5.50. Find the average rate of change of movie tickets price in dollars per year.
Answer

$0.20

$0.25

$4.00

$0.85

Answer 1

(f(b) - f(a)) / (b-a) = (5.50 - 3.00) / (1999-1989) = 2.50/10 = 0.25

Answer 2

avg are found by div totals
here it shud be (3+5.50)/(1999-1989)
since the total no of yrs is 1999-1989=10
8.50/10=.85
$.85

Answer 3

wats the right opt