Math Problem Statement

Write the equation of this line in slope-intercept form based on the graph provided.

Solution

To find the equation of the line in slope-intercept form, y=mx+by = mx + b, we need to determine the slope mm and the y-intercept bb of the line.

Step 1: Find the y-intercept bb

From the graph, the line crosses the y-axis at y=2y = -2. Therefore, the y-intercept b=2b = -2.

Step 2: Find the Slope mm

The slope mm is calculated using the formula: m=riserunm = \frac{\text{rise}}{\text{run}} Choose two points on the line. From the graph, it appears that the line passes through:

  • Point 1: (6,5)(-6, -5)
  • Point 2: (0,2)(0, -2)

Using these points: m=2(5)0(6)=36=12m = \frac{-2 - (-5)}{0 - (-6)} = \frac{3}{6} = \frac{1}{2}

Step 3: Write the Equation

With m=12m = \frac{1}{2} and b=2b = -2, the equation of the line is: y=12x2y = \frac{1}{2}x - 2

Final Answer

The equation in slope-intercept form is: y=12x2y = \frac{1}{2}x - 2

Would you like a deeper explanation of any part of this solution, or have any questions?


Here are five questions related to this concept:

  1. How do you find the slope if you have two points on a line?
  2. What does the y-intercept represent in a graph?
  3. How can you verify if a line is increasing or decreasing from its slope?
  4. What is the significance of the slope in the context of real-world problems?
  5. How do you convert slope-intercept form to standard form?

Tip: Always reduce the slope fraction to its simplest form for clarity in answers.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

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

Theorems

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Suitable Grade Level

Grades 7-9