week 13- pre calc 11

This week in PreCalc 11,

we learned how to graph absolute value functions.
An Absolute Value Functions is a function that has an expression within absolute value symbols. We were taught before that Absolute Values, was when the number is between the absolute value symbols must come out a positive. Example, | -2 | = 2 .

Example:
y = | -2x + 4 |
Step 1: Graph the Parent Function
The first step is to graph the parent function. The parent function is the same function but without the absolute value symbols.

In this case, the parent function is y = -2x + 4.

 

Step 2: change the Negative Values to positive
y-values in the parent function can’t be negative that’s why there’s an absolute value function. So all we have to do is change the negative y-values into a positive and then graph it again.

 

 

and as u can see the parent function is shown in this graph but where it intercepts with the x intercept is where it bounces back up.

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