Alg 2 Ch 6 Review

• y=o

• x=0

• x=0 and y=0

What does the a in y=a(1+r)^x  represent?

• Time
• Rate
• Slope
• Initial Amount

In an exponential function, what does the 'a' represent? 

• SLOPE
• RATE OF CHANGE
• STARTING VALUE
  (y-intercept)
• GROWTH FACTOR

• The end behavior of the graph is x →∞, y→⁻∞ and x →⁻∞,y→⁻∞
• The end behavior of the graph is x →∞, y→∞ and x→⁻∞, y→∞
• The end behavior of the graph is x →∞, y→∞ and x→⁻∞, y→2
• The end behavior of the graph is x →∞,y→2 and x→⁻∞, y→∞

• Linear Growth

• Linear Decay

• Exponential Growth

• Exponential Decay

• Because the 0.25 was bigger than one

• Because the 1.3 was bigger than one

• Because the 0.25 was less than one

• Because the 1.3 was less than one

If the decay rate is 20%, which of the following represent the decay factor?

• 0.2

• 0.8

• 1.2

• 1.8

 A flea medicine breaks down at a rate of 20% per hour.  This is the rate of decay of the medicine. The initial dose is 60 milligrams. Which of the following represent the equation the models the amount of flea medicine left in an animal?

Riley invested $1,000 in savings bonds. If the bonds earn 6.75% interest compounded semi-annually, how much total will Riley earn in 15 years?

• $1,584.62
• $2,651.39
• $2,706.86
• $1,825.10

Cora invested $400 at a rate of 35% for 8 months, compounded continuously. How much is her investment worth after 8 months?

• $520.07

• $505.12

• $460.11

• $7,643.74