The equation $y = 9x$ represents a linear function where the slope is 9. Here's some basic information about it:

• Slope (m): The slope is 9, meaning that for every unit increase in $x$, $y$ increases by 9 units.
• Y-intercept (b): Since there is no constant term, the y-intercept is 0. This means the line passes through the origin (0,0).
• Graph: The graph of this equation is a straight line that slopes upwards from left to right at a steep rate due to the large slope.

Would you like a detailed explanation of the graph or its applications?

Here are 5 related questions for you to consider:

1. What is the slope of the line in the equation $y = 9x + 3$?
2. How does changing the slope to 2 in $y = 2x$ affect the graph?
3. How can you find the x-intercept for a linear equation like $y = 9x$?
4. What is the equation of a line parallel to $y = 9x$?
5. What happens to the graph if we change $y = 9x$ to $y = 9x - 5$?

Tip: The slope in a linear equation like $y = mx + b$ always tells you how steep the line is and whether it rises or falls.