Big Ideas Math Algebra 2, 2014
BI
Big Ideas Math Algebra 2, 2014 View details
1. Parent Functions and Transformations
Continue to next subchapter

Exercise 19 Page 9

Describe the parent function, then use slope to graph the functions.

Graph:

Transformation: A vertical shrink by a factor of 13.

Practice makes perfect

The given function is linear, so its parent function is y=x. We will start by graphing both functions in one coordinate plan. Then we will compare them to describe the transformation.

Graphing the Functions

To graph both of the functions, we will use their slopes and y-intercepts.

Function Slope-intercept form Slope y-intercept
y=x y= 1x+ 0 1 0
y=1/3x y= 1/3x+ 0 1/3 0

Now let's plot the functions! In both cases, start at the y-intercept and draw a line using the slope.

Comparing the Functions

Having drawn our functions, we can describe the transformation.

We see that each y-value is being multiplied by 13, and all points are being pushed towards the x-axis. This is a vertical shrink by a factor of 13.