The slope-intercept form of a line's equation is:

$y = mx + b$

Where:

• $m$ is the slope of the line
• $b$ is the y-intercept of the line

Given:

• Slope $m = -2$
• Y-intercept $b = -15$

Substitute these values into the slope-intercept form:

$y = -2x - 15$

So, the equation of the line is:

$y = -2x - 15$

Would you like more details on how to graph this equation or understand its properties?

Here are 5 related questions:

1. How do you find the slope of a line from two given points?
2. How do you convert a slope-intercept form equation to standard form?
3. What does the slope of a line represent in real-world situations?
4. How do you find the x-intercept of a line from its equation?
5. What happens to the graph of a line if the slope changes but the y-intercept stays the same?

Tip: When graphing lines, the y-intercept is the point where the line crosses the y-axis, and it helps you start plotting the line easily.