Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease.
y=770(1.31)^x

Taber invested money in an account where interest is compounded every year.he made no withdrawals or deposits. the function a(t)=525(1+0.05)^t represent the amount of money in the account after t years. how much money did taber origanally invested?