Answer:
4 weeks
Step-by-step explanation:
15 + 2x = 23
2x = 8
x = 4
The +k part of the function takes the original function and translates it straight up k units. It's as simple as that. If your function is the line f(x) = 3x, then the function f(x) = 3x + 4 moves that first function up 4 units.
Y=5 because you add 4+1=5