Math Problem Statement

Find the values of m (slope) and b (y-intercept) from the given graph.

Solution

To find the values of mm (the slope) and bb (the y-intercept) for the line, we can use the slope-intercept form of a linear equation, which is:

y=mx+by = mx + b

From the graph:

  1. Y-intercept (bb): This is where the line crosses the y-axis. Looking at the graph, the red line crosses the y-axis at y=2y = 2. Therefore, b=2b = 2.

  2. Slope (mm): The slope is the "rise over run," or the change in yy divided by the change in xx. Let's use two clear points on the line. We can see the line passes through:

    • (4,2)(-4, -2)
    • (0,2)(0, 2)

    The slope is calculated as:

    m=y2y1x2x1=2(2)0(4)=44=1m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{2 - (-2)}{0 - (-4)} = \frac{4}{4} = 1

Thus, the values are:

  • m=1m = 1
  • b=2b = 2

Would you like any further explanation or clarification on this?

Related questions:

  1. What is the general form of a linear equation?
  2. How do you calculate the slope if the points are not visible clearly on a graph?
  3. Can you explain the meaning of a positive vs. negative slope?
  4. How can you find the equation of a line if only given the slope and one point?
  5. What happens to the graph if the slope or intercept changes?

Tip:

The y-intercept (bb) is always the point where the line crosses the y-axis, and the slope (mm) determines the steepness and direction of the line.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Graphing

Formulas

y = mx + b

Theorems

Slope formula
Y-intercept

Suitable Grade Level

Grades 8-10