Math Problem Statement

Graph the line: y = 3x - 8

Solution

The equation provided is y=3x8y = 3x - 8, which is in slope-intercept form y=mx+by = mx + b, where:

  • m=3m = 3 is the slope, meaning the line rises 3 units for every 1 unit it moves to the right.
  • b=8b = -8 is the y-intercept, meaning the line crosses the y-axis at y=8y = -8.

To graph this line:

  1. Start by plotting the y-intercept, (0,8)(0, -8).
  2. Use the slope m=3m = 3 to find another point: From (0,8)(0, -8), move 1 unit to the right (along the x-axis) and 3 units up. This gives the point (1,5)(1, -5).
  3. Draw a line through these two points.

Would you like me to provide further details or explanations?

Here are five related questions to expand this topic:

  1. How do you determine the slope from a line given two points?
  2. What does it mean when the slope of a line is negative?
  3. How can you find the x-intercept of a linear equation?
  4. What happens to the graph if the slope becomes smaller, such as y=12x8y = \frac{1}{2}x - 8?
  5. Can a linear equation have no y-intercept?

Tip: The slope of a line describes its steepness. A higher slope means a steeper line, while a smaller slope results in a flatter line.

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Math Problem Analysis

Mathematical Concepts

Linear equations
Graphing
Slope-intercept form

Formulas

y = mx + b

Theorems

Slope-intercept theorem

Suitable Grade Level

Grades 8-10