exponential functions

4. becomes greater or goes up
6. a decrease in the value of something over time, usually written in a %
7. where a value increases in proportion to its current value
8. based on the principal amount
9. the ratio between two related quantities in different units
11. the process of reducing an amount by a consistent percentage rate over a period of time.
12. the beginning output value, or the y-value when x = 0.

1. horizontal lines, parallel to
2. based on the principal amount and the interest
3. lowers or goes down
5. a function whose value is a constant raised to the power of the argument, especially the function where the constant is e.
10. where x=0, the point that crosses the y-axis.