Understanding how variables and constants change the graphs of algebraic expressions can be tricky. But don't worry! Let’s break it down.

1. Variables:

   • Variables can create uncertainty in how the graph looks.
   • For example, in the equation (y = mx + c), if you change (m), it changes the slope. This makes it harder to guess how the graph will behave.

2. Constants:

   • Constants are fixed values, but they can be confusing because they shift graphs in certain ways.
   • For example, if you add a constant, it shifts the entire graph up or down. Sometimes, this can easily be missed.

Solution: The best way to understand is by practicing graphing different expressions. Look closely at how each part affects the graph. This practice will help you see how variables and constants work together.