Exponential Functions

Growth or Decay?
y=5(2)^x

• Growth
• Decay

Growth of Decay?
y=.02(.03)^x

• Growth
• Decay

Growth of Decay?
y=2(.55)^x

• Growth
• Decay

Growth, Decay, or Neither??
x-  0,    2,  4,  6,   8
y-   64, 16,  4,  1,  .25

• Growth
• Decay
• Neither

Growth, Decay, or Neither??
x-  0,    1,   2,  3,   4
y-   2,   4,  6,  8,  10

• Growth
• Decay
• Neither

Evaluate the Function
y=(3)^x ; x=-2

• 1/9
• 9
• 6
• 1/6

Tags

CCSS.HSF.IF.A.2

CCSS.HSF.LE.A.1

Evaluate the Function
y=-2(5)^x ; x=3

• -250
• -1000
• 250
• 1000

Tags

CCSS.HSF.IF.A.2

Evaluate the Function
f(x)= 3(½)^x ;x=-2

• 4/9
• 12
• 3/4
• 9

Tags

CCSS.HSF.IF.A.2

Compound Interest.  Formula on board/notes.

Suppose Karen has $2000 that she invests in an account that pays 3% interest compounded quarterly. How much money does Karen have at the end of 5 years?

• $2,322.37
• $8,495.70
• $2,321.94

Compound Interest.  Formula on board/notes.
 William wants to have a total of $3000 in two years so that he can buy an engagement ring.  He finds an account that pays 5% interest compounded monthly. How much should William put into this account so that he’ll have $3000 at the end of two years?

• $3,314.82
• $2715.08
• $1,126.24