Math Problem Statement

Graph the line: y = -3x - 3

Solution

The equation provided is y=3x3y = -3x - 3, and you are asked to graph the line.

This is a linear equation in slope-intercept form: y=mx+by = mx + b, where:

  • mm is the slope of the line
  • bb is the y-intercept.

For y=3x3y = -3x - 3:

  • The slope m=3m = -3, meaning that for every 1 unit increase in xx, the value of yy decreases by 3.
  • The y-intercept b=3b = -3, meaning the line crosses the y-axis at y=3y = -3.

Steps to graph the line:

  1. Start with the y-intercept: Plot the point (0,3)(0, -3) on the graph. This is where the line crosses the y-axis.
  2. Use the slope: The slope is 3-3, or 31\frac{-3}{1}. This means you move 1 unit to the right along the x-axis and 3 units down along the y-axis from the y-intercept.
    • From (0,3)(0, -3), move right to (1,6)(1, -6) and plot this point.
  3. Extend the line: Continue applying the slope or use another approach (e.g., symmetry or plotting more points) to extend the line in both directions.
  4. Draw the line: Connect the points to form a straight line.

Would you like me to generate the graph or further explain any of these steps?


Here are five related questions to deepen your understanding:

  1. How does the slope of the line affect its steepness?
  2. What is the significance of the y-intercept in a real-world scenario?
  3. How would the graph change if the slope were positive?
  4. Can you determine the x-intercept for this line?
  5. How do parallel and perpendicular lines relate in terms of their slopes?

Tip: Always check the sign of the slope to know whether the line will incline upward or downward as you move from left to right.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing

Formulas

Slope-intercept form: y = mx + b

Theorems

Concept of Slope
Y-intercept Theorem

Suitable Grade Level

Grades 6-8