Answer:
y=-0.5ˣ
Step-by-step explanation:
each time the x-value is increased by one, the y-value is cut in half compared to the previous point
Cannot guarantee. But I believe the answers are:
1) (3,2)
2) (3,-2)
3) (-3,2)
4) (-3,-2)
Edit: These are correct. When you substitute these into each equation,you get 72.
The negatives work because (-x)^2 = positive
Using online calculators is great
An = 18(1/2)^(n-1)
Alternatively, you could also do:
an = 36(1/2)^n
(2n - 9) - 5(-2.4n + 4) =
The first set of parentheses is unnecessary, so we just drop them.
= 2n - 9 - 5(-2.4n + 4)
Now we distribute -5 by the second set of parentheses. Each term in the parentehses is multiplied by -5.
= 2n - 9 + 12n - 20
Now we combine like terms.
= 2n + 12n - 9 - 20
= 14n - 29