exponential functions

Which graph is an exponential function?

• red

• blue

• green

• none

Estimate the half-life of the radioactive substance shown in the graph:

• 6 months

• 6 hours

• 1 year

• 1 minute

Is the pictured graph exponential growth, exponential decay, or linear or none?

• Exponential Growth

• Exponential Decay

• Linear

• None

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

• SLOPE

• RATE OF CHANGE

• Y-INTERCEPT

• COMMON RATIO

What is the domain and range of the function y=2^x ?
Use the graph to help!

•  Domain: −∞<x<∞ Range: y>0

• Domain: −∞<x<∞ Range: y>1

• Domain: −2<x<∞ Range: y>0

• Domain: −∞<x<∞ Range: y<0

Suppose the population of a species of insects doubles every year. There are 1600 insects initially. The function for the scenario would be?

• $f\left(x\right)=2x+1600$

• $f\left(x\right)=1600\times2$

• $f\left(x\right)=1600\cdot2^x$

What is the y-intercept of the function?

• 2
• 3
• 1
• -2

Write the equation of the exponential function for the given graph.

• y = 1(4)^x

• y = 4(1)^x

• y = 1(1/4)^x

• y = 1/4(1)^x

Use the function $n\left(t\right)=14000\left(.96\right)^t$  Where n is the number of employees and t is the number of years.

How many employees will there be after 3 years?

• 14,000 employees

• 12,386 employees

• 40,360 employees

• 15,748 employees

In the linear equation, y = mx + b, the letter b is the ___________.

• y-intercept/initial value

• x-intercept

• slope

• rate of change