Math Problem Statement

Write the equation of this line in slope-intercept form.

Solution

The image shows a graph of a straight line. We are tasked with finding the equation of the line in slope-intercept form, which follows the formula:

y=mx+by = mx + b

Where:

  • mm is the slope of the line.
  • bb is the y-intercept (the point where the line crosses the y-axis).

Steps to solve:

  1. Identify the slope:

    • To find the slope, we need two points on the line.
    • Looking at the grid, it appears the line passes through (0,2)(0, 2) (the y-intercept) and (4,0)(-4, 0) (another clear point where the line crosses the x-axis).
    • The slope mm is calculated as the change in yy divided by the change in xx:

    m=y2y1x2x1=0240=24=12m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{0 - 2}{-4 - 0} = \frac{-2}{-4} = \frac{1}{2}

    So, the slope m=12m = \frac{1}{2}.

  2. Identify the y-intercept:

    • From the graph, the line crosses the y-axis at (0,2)(0, 2). Therefore, b=2b = 2.

Final Equation:

Thus, the equation of the line in slope-intercept form is:

y=12x+2y = \frac{1}{2}x + 2

Would you like further clarification or more details on this process?

Relative Questions:

  1. How do you determine the slope of a line using two points?
  2. What is the slope-intercept form of a linear equation?
  3. How does the y-intercept affect the position of a line?
  4. Can a line have a negative slope? What would that look like?
  5. How can you rewrite this equation in standard form?

Tip: Always pick two points that are easy to read on the graph to accurately calculate the slope.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Slope Formula

Suitable Grade Level

Grades 7-9