This video shows how to evaluate functions like f(x) = 5x - 7 when you the value for either know the input (x)or output (f(x)), plus how to evaluate using graphs instead of equations. SUBSCRIBE AND MAKE YOUR PARENTS PROUD 0:00 Introduction 0:45 The Idea of Functions with input and output values 1:49 Finding the output if given the x value 5:16 Finding the input if given the f(x) value 6:41 How to use graphs to evaluate functions