PLZ HELP ME and show your work

cant seee sry

Step-by-step explanation:

4 = a

0 < b <1

Step-by-step explanation:

y = a* b^x

We know that when x=0  y = 4

4 = a * b^0

4 = a * 1

4 = a

That means a = 4

y = 4 * b^x

We also know that it is decreasing which means b must be between 0 and 1

0 < b <1