1. Let's create a simple linear equation that is easy to fit on a cue card. 2. A linear equation has the form $$y = mx + b$$ where $m$ is the slope and $b$ is the y-intercept. 3. For simplicity, choose $m = 2$ and $b = 3$. 4. So the equation is $$y = 2x + 3$$. 5. This equation is easy to remember and write on a small card. 6. It shows a straight line with slope 2 and intercept 3 on the y-axis.