The number line is a closed circle because the circle at the ends are not shaded in. A closed circle to the right means greater than. (>) A closed circle to the left means less than. (<)
2,000,000 because 24/12 is 2 so you double it twice
78, because you have to do the inverse operation so 80/2= 40 then 40-1= 39 and 39*3 = 78
We are told that f(1) = -1.5, and that f(n+1) = -2f(n).
Then: f(2) = -2f(1) = -2(-1.5) = +3 (answer)
