Math Problem Statement

Graph this line using the slope and y-intercept: y = -6x + 8.

Solution

The equation to graph is y=6x+8y = -6x + 8. Here's how you can graph this line using its slope and yy-intercept:

  1. Identify the y-intercept:
    The yy-intercept is where x=0x = 0. From the equation, the yy-intercept is 88. So the point (0,8)(0, 8) is one point on the line.

  2. Use the slope to find another point:
    The slope of the line is 6-6, which means for every 1 unit increase in xx, yy decreases by 6 units. Alternatively, you can express the slope as 6/1-6/1, indicating a "rise" of 6-6 (downward) and a "run" of 11 (rightward).

    Starting from (0,8)(0, 8):

    • Move 1 unit to the right (x=1x = 1).
    • Move 6 units down (y=86=2y = 8 - 6 = 2).
    • The second point is (1,2)(1, 2).
  3. Plot the points and draw the line:

    • Plot (0,8)(0, 8) and (1,2)(1, 2) on the graph.
    • Draw a straight line through these two points to represent the equation y=6x+8y = -6x + 8.

Let me know if you'd like further clarification or additional questions!

Here are five related questions to deepen your understanding:

  1. How can you determine the slope from a graph?
  2. What does a negative slope signify about the direction of the line?
  3. How would you graph a line with a slope of zero?
  4. If the yy-intercept were 4-4, how would the graph change?
  5. How do you find the equation of a line from two points on the graph?

Tip: Always label the points you plot clearly to avoid confusion when drawing the line.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form
Graphing on the Coordinate Plane

Formulas

y = mx + b (Slope-Intercept Form)
Slope = Rise/Run

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 8-10