+0

how is this done

0
340
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find f(-5)

f(x) = |x|

Guest Jun 16, 2014

#1
+85718
+8

f(-5)   means that we are putting "-5" in for "x" in the absolute value function........ l x l

l -5 l       We are basically asking....."How far is -5 from 0 on the number line??"   Answer....5 units

So l -5 l  = 5         Absolute value measures distance so it is always either positive or 0......

CPhill  Jun 16, 2014
Sort:

#1
+85718
+8

f(-5)   means that we are putting "-5" in for "x" in the absolute value function........ l x l

l -5 l       We are basically asking....."How far is -5 from 0 on the number line??"   Answer....5 units

So l -5 l  = 5         Absolute value measures distance so it is always either positive or 0......

CPhill  Jun 16, 2014

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