Which equation below will produce a decay curve?

Question

A.)  y=3^x-4

B.)  y=2(4)^x

C.)  y=1/2(3)^x

D.)  y=6(1/3)^x

 

First of what is a decay curve and how do you find it?

Answer 1

Decay means that when your x value increases, your y value decreases exponentially.  To determine which graph will produce a decay curve, chose three x values.  Start with x=0, x=2, x=4.  Plug in these values for each function.  The function whose y value decreases will be your decay curve.