1. The problem is to create a very low long diagonal line, which can be represented by a linear function with a small positive slope. 2. The general formula for a line is $y = mx + b$, where $m$ is the slope and $b$ is the y-intercept. 3. To make the line very low and long diagonal, we choose a small slope, for example $m = 0.1$, and set $b = 0$ for simplicity. 4. Thus, the function is $y = 0.1x$. 5. This line rises slowly as $x$ increases, creating a long, low diagonal line. Final answer: $$y = 0.1x$$