Math Problem Statement

Which graph represents the equation y = 3/4x - 3?

Solution

The equation given is y=34x3y = \frac{3}{4}x - 3, which is in slope-intercept form, y=mx+by = mx + b, where:

  • m=34m = \frac{3}{4} is the slope
  • b=3b = -3 is the y-intercept.

Steps to analyze:

  1. Y-Intercept: The line intersects the y-axis at (0,3)(0, -3), so the graph must pass through this point.
  2. Slope: The slope is 34\frac{3}{4}, meaning for every 4 units moved to the right on the x-axis, the line rises by 3 units on the y-axis.

Now, let's analyze the graphs:

  • The top-left graph has a y-intercept of 3-3 and a positive slope, which appears to match 34\frac{3}{4}. The line rises by 3 and runs by 4 correctly.
  • The other graphs either have incorrect y-intercepts or incorrect slopes.

Thus, the top-left graph is the correct representation of the equation.

Would you like more details on how to graph lines, or do you have other questions?

Related Questions:

  1. How do you find the slope from two points?
  2. What does a negative slope look like on a graph?
  3. How does the slope-intercept form differ from point-slope form?
  4. How can you check if a point lies on a given line?
  5. What are other forms of linear equations besides slope-intercept form?

Tip:

When graphing, always plot the y-intercept first, then use the slope to find another point.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Graphing Lines
Slope-Intercept Form

Formulas

Slope-Intercept Form: y = mx + b

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 8-10