Given the following exponential function, identify whether the change represents growth or decay, and determine the percentage rate of increase or decrease. y=57(0.4)^x

Decay, 60%

Step-by-step explanation:

Remember that the exponential function is written in the form . In this problem, a=57 and b=0.4. A function is considered a growth function when . Since 0.4 not greater than 1, this is an exponential decay function.

Now, to find the rate of decrease we can use part of the form .

represents the percentage decrease, in this case, 0.4. If that entire term is 0.4, we need to solve for .

So, the rate of percentage decrease is 60%.

I hope this helps!

the f

last graph i believe

step-by-step explanation:

worked it out i believe