Answer: D
Step-by-step explanation:
We know the midline is at y=40, so eliminate A and B.
The period is 160, so
This eliminates option C, leaving us with D.
Answer:
it is a relationship where the first difference is equal and the second difference is 0
The number is -9.
If we let the number be x we have the equation 6x + 7 = -47.
6x + 7 - 7 = -47 - 7
6x = -54
x = 054/6
x = -9.
