Answer:
Step-by-step explanation:
80,120,160.....
This is an arithmetic sequence
common difference (d) = 2nd term - 1st term
= 120 - 80 = 40
first term (a) = 80
nth term = a + (n-1)d
= 80 + (n-1)*40
= 80 + 40n -40
= 40 + 40n
This is a function because all the x values are different automatically making it a function. But if there were two of the same x values and they had different y values it wouldn’t be a function. Hope that makes sense!
Answer:
2
Step-by-step explanation:
On the picture above.
In thirty months you should have 5,250.00
<u>ANSWER</u>
It is not one-to-one function
<u>EXPLANATION</u>
A one-to-one function must pass the horizontal line test.
The graph described in the question looks like the one in the attachment.
A horizontal line drawn in red cuts the graph at more than one point.
Therefore the parabola shown facing up with a vertex 
is not a one-to-one function.
