Math Problem Statement

Find the slope of the line graphed below.

Solution

To find the slope of the line graphed in the given image, we use the formula for slope:

slope (m)=ΔyΔx=y2y1x2x1\text{slope (m)} = \frac{\Delta y}{\Delta x} = \frac{y_2 - y_1}{x_2 - x_1}

From the graph, two points on the line are:

  1. Point A: (5,4)(-5, 4)
  2. Point B: (5,0)(5, 0)

Using the formula: m=y2y1x2x1=045(5)=410=25m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{0 - 4}{5 - (-5)} = \frac{-4}{10} = -\frac{2}{5}

The slope of the line is:

m=25m = -\frac{2}{5}

Would you like further explanation on this concept or related examples?


Additional Questions:

  1. How do you interpret a negative slope in a graph?
  2. Can you derive the slope if the graph is not straight?
  3. How does the slope relate to the angle of the line with respect to the x-axis?
  4. What would happen if the x-values or y-values were swapped in the calculation?
  5. How can the slope formula help find the equation of the line?

Tip:

Always choose points that lie exactly at the intersection of the grid lines for precise slope calculation.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope of a Line

Formulas

Slope formula: m = (y2 - y1) / (x2 - x1)

Theorems

Definition of slope as rate of change in a linear function

Suitable Grade Level

Grades 7-9