The slope of the line with equation $y = mx + b$ is the number of units that y increases per unit increase in x.

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Here are 5 related questions to deepen your understanding:

1. What does a negative slope indicate about the relationship between $x$ and $y$?
2. How do you calculate the slope given two points on the line?
3. What is the physical meaning of slope in a real-world context, such as speed or rate of change?
4. How does changing the value of $m$ affect the steepness of the line?
5. What does the $b$ represent in the equation $y = mx + b$?

Tip: The slope $m$ represents the "rate of change" between $x$ and $y$. The larger $m$, the steeper the line.