body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Pearson Algebra 2 Common Core, 2011

PA

Pearson Algebra 2 Common Core, 2011 View details

Mid-Chapter Quiz

Continue to next subchapter

Exercise 3 Page 461

The y- intercept is the point (0,a).

Answer: Exponential growth
y-intercept: 7/8

Practice makes perfect

We want to determine whether the given function represents exponential growth or exponential decay. Let's recall the general form of an exponential function. y= a b^x

Growth or Decay?

The value of b tells us whether the function is growth or decay.

If b>1, the function represents exponential growth.
If 0

Let's consider the given function. y= 7/8 ( 18)^x We can see that b= 18. Since b>1, the function represents exponential growth.

Determining the y-intercept

The y-intercept of an exponential function is (0,a). Looking back at the given function, we can see that a= 78. Therefore, the y-intercept is (0, 78).