Is this really a school question or is it just you being weird?
Solution: 7.5 Degrees per hour
Reasoning: 15/2 is equal to 7 1/2 or 7.5
1^81, 9^2, 3^4. the others are rather to high or to low
An explicit equation is an equation used to find a term in a sequence without using the any previous terms. For example, if I have the set of numbers 1, 3, 5, 7, 9, my explicit equation is F(n)=2(n-1)+1. If I plug 1 in for n, I get F(1)= 2(0)+1, which is 1, my first term.
Hope this made sense.