Math Problem Statement

Graph the line y = -4x + 2.

Solution

To graph the line given by the equation y=4x+2y = -4x + 2, we can follow these steps:

  1. Identify the slope and y-intercept:

    • The equation is in slope-intercept form y=mx+by = mx + b, where mm is the slope and bb is the y-intercept.
    • Here, the slope m=4m = -4 and the y-intercept b=2b = 2.
  2. Plot the y-intercept:

    • The y-intercept is the point where the line crosses the y-axis. Since b=2b = 2, plot the point (0,2)(0, 2) on the graph.
  3. Use the slope to find another point:

    • The slope m=4m = -4 means that for every 1 unit you move to the right along the x-axis, you move 4 units down (since the slope is negative).
    • Starting from (0,2)(0, 2), move 1 unit to the right to x=1x = 1, then move 4 units down to y=2y = -2. This gives you another point (1,2)(1, -2).
  4. Draw the line:

    • Plot the points (0,2)(0, 2) and (1,2)(1, -2).
    • Use a ruler to draw a straight line through these points. Extend the line in both directions to cover the graph.

I'll now graph the line on the given coordinate plane.


Here is how it looks:

  1. The line crosses the y-axis at (0,2)(0, 2).
  2. It passes through the point (1,2)(1, -2).
  3. The line is drawn with a negative slope, so it goes down as you move from left to right.

Would you like to see the graph or have any further details?

Here are some related questions:

  1. What does the slope of a line represent in a graph?
  2. How can you determine the slope from two given points on a line?
  3. How would the graph change if the slope were positive instead of negative?
  4. How can you graph a line given in point-slope form?
  5. What is the significance of the y-intercept in different types of linear equations?

Tip: When graphing lines, always check the slope and y-intercept first—they are the keys to drawing the graph accurately.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

Slope-intercept form: y = mx + b

Theorems

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Suitable Grade Level

Grades 7-9