Math Problem Statement

Graph the line with the equation y = -x - 2.

Solution

The equation of the line given is y=x2y = -x - 2, which is in slope-intercept form y=mx+by = mx + b. Here's the breakdown:

  • Slope (m): The coefficient of xx is 1-1, so the slope is 1-1. This means for every 1 unit you move to the right on the xx-axis, you move 1 unit down on the yy-axis.
  • Y-intercept (b): The constant 2-2 is the y-intercept, meaning the line crosses the yy-axis at (0,2)(0, -2).

Steps to graph the line:

  1. Plot the y-intercept at (0,2)(0, -2).
  2. Use the slope to find another point. Since the slope is 1-1, from (0,2)(0, -2), move 1 unit to the right and 1 unit down to get to (1,3)(1, -3).
  3. Repeat this to plot a few more points, e.g., (2,4)(2, -4), (1,1)(-1, -1), etc.
  4. Draw the line through these points.

Would you like more details on graphing, or should I help with anything else?


Here are some related questions:

  1. How do you determine the slope of a line from an equation?
  2. What is the significance of the y-intercept in a linear equation?
  3. How does changing the slope affect the angle of the line on the graph?
  4. What is the equation of a line parallel to y=x2y = -x - 2?
  5. How would you graph a line with a positive slope instead of a negative one?

Tip: The slope indicates how steep the line is. A larger absolute value of the slope results in a steeper line!

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

Slope-intercept form y = mx + b

Theorems

Slope of a Line
Y-intercept

Suitable Grade Level

Grades 7-9