Math Problem Statement

Write an equation of the line based on the graph shown in the image.

Solution

Let's analyze the graph and determine the equation of the line.

Key steps:

  1. Identify two points on the line: From the image, I can see two points where the line crosses grid points:

    • Point 1: (0, 3) (y-intercept)
    • Point 2: (4, -3)
  2. Calculate the slope: The slope (mm) is determined by the formula:

    m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

    Using points (0, 3) and (4, -3):

    m=3340=64=32m = \frac{-3 - 3}{4 - 0} = \frac{-6}{4} = -\frac{3}{2}

  3. Use the slope-intercept form of the line: The slope-intercept form is:

    y=mx+by = mx + b

    We know the slope m=32m = -\frac{3}{2} and the y-intercept b=3b = 3 from the point (0, 3). Thus, the equation of the line is:

    y=32x+3y = -\frac{3}{2}x + 3

This is the equation of the line in the graph.

Would you like any more details or further clarifications?

Here are 5 related questions:

  1. How do you find the slope if given only two points on a line?
  2. What is the slope-intercept form of a linear equation?
  3. How do you interpret the slope and y-intercept in real-world scenarios?
  4. How can you convert a slope-intercept equation to standard form?
  5. How does changing the slope affect the steepness of the line?

Tip: Always start by identifying two clear points on the graph to accurately calculate the slope.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)
Slope-intercept form: y = mx + b

Theorems

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Suitable Grade Level

Grades 8-10