How do you determine if an exponential formula is growth or decay? Algebra Exponents and Exponential Functions Exponential Decay 1 Answer Wataru Nov 12, 2014 #f(t)=Ce^{kt}# is an exponential #{("growth if " k>0),("decay if " k<0):}#. I hope that this was helpful. Answer link Related questions How do you graph exponential decay functions? What is the exponential decay formula? How do you graph #y=(\frac{1}{5})^x#? How do you create an (x,y) table for #y=\frac{3}{4} \cdot 6^{-x}#? How do you know if #y = 2.5(0.8)^x# represents exponential growth or decay? How do you determine the value of an x-ray machine after 5 year if it cost $216 thousand and... What is the growth factor, initial amount for #M(t)=8(2)^(1/6t)#? What is the difference between the graph of a exponential growth function and an exponential... Is the function # y = -5(1/3)^ -x# exponential growth or decay? The value of a car decreases at an annual rate of 9.9%. It is currently worth $15000. When... See all questions in Exponential Decay Impact of this question 4275 views around the world You can reuse this answer Creative Commons License