Evaluate the function f(x) = |x - 5| for x = 3

Question

The x is 3 and this should help me pass math class 

Answer 1

Karli, you simply plug 3 in for x.

 

f(3) = |3 - 5|

f(3) = |-2|

f(3) = 2

 

Hopefully, you know that absolute value is the distance grom 0, and distance is measured using positive numbers. That's why 2 and -2 both have the same absolute value, because they are both 2 away from 0.