Ca-7 2
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- Pages: 7
f(x) = a.bx + k a = initial amount b = growth or decay factor 01 growth k = asymptote (translation)
graph using domain : 0, 1 y = (1/4)x y = 2(1/5)x y = 3(2)x
growth y = a(1+r)t decay y = a(1-r)t y = final amount a = initial amount r = rate t = time
1. You buy an new mountain bike for $200. The value of the bike decreases by 25% each year. a) Write a model giving the mtn bike's value (y) after t years. b) find the value after 3 years c) how long until the bike is worth $100.
2. In 1992, 1219 monk parakeets were observed in the United States. For the next 11 years about 12% more parakeets were observed each year. a)Write the equation to represen the situation. b) How many parakeets were in the US after 11 years?
HW: 7.1 #25, 28-30, 35-38 7.2 #3-9,15,26, 30-33
graph using domain : 0, 1 y = (1/4)x y = 2(1/5)x y = 3(2)x
growth y = a(1+r)t decay y = a(1-r)t y = final amount a = initial amount r = rate t = time
1. You buy an new mountain bike for $200. The value of the bike decreases by 25% each year. a) Write a model giving the mtn bike's value (y) after t years. b) find the value after 3 years c) how long until the bike is worth $100.
2. In 1992, 1219 monk parakeets were observed in the United States. For the next 11 years about 12% more parakeets were observed each year. a)Write the equation to represen the situation. b) How many parakeets were in the US after 11 years?
HW: 7.1 #25, 28-30, 35-38 7.2 #3-9,15,26, 30-33
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