Exponential

Suppose a culture of bacteria begins with 5000 cells and dies by 30% each year. Write an equation that represents this situation.

• y=5000(0.7)^x

• y=30(5000)^x

• y=5000(1.3)^x

• y=5000x^x

Which of the following models represents exponential decay?

• y = 5(1 + .05)^t

• y = 5(1 - .05)^t

• y = .8(1 + .05)^t

• y = -2(1 + .05)^t

Which of the following models represents exponential growth?

• y = 4(1 + .08)^t

• y = 4(1 - .08)^t

• y = .5(1 - .08)^t

• y = 11(1 - .08)^t

Which of the following is an example of exponential growth?

• y = 8(1.05)^t

• y = 8(.95)^t

• y = (.99)^t

• y = 9(1 - .5)^t

Is this exponential growth or decay?

• Growth

• Decay

Pick the equation that is exponential growth

• y=2(0.5)^x

• y = 0.5(2)^x

Which of the following is an example of exponential decay?

• y = 3(5)^x

• y = .5(5)^x

• y = 2(.5)^x

• y = 8(1)^x

Which graph represents exponential growth?

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Which graph represents exponential decay?

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Write the exponential equation for the situation. In 1971, there were 294,105 females participating in high school sports. Since then, that number has tripled each year. Write an equation to represent the number of females participating in high school sports since 1971.