Math Problem Statement

The graph of a function is shown on the coordinate plane below. Identify the rate of change of the function.

Solution

To determine the rate of change (slope) from the graph provided, we can follow these steps:

Step 1: Identify two points on the line

From the image, two clear points on the line appear to be:

  • Point 1: (5,4)(-5, 4)
  • Point 2: (5,4)(5, -4)

Step 2: Use the slope formula

The slope (rate of change) mm is given by:

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

Plugging in the coordinates from the two points:
(x1,y1)=(5,4)(x_1, y_1) = (-5, 4) and (x2,y2)=(5,4)(x_2, y_2) = (5, -4):

m=445(5)=810=45m = \frac{-4 - 4}{5 - (-5)} = \frac{-8}{10} = -\frac{4}{5}

Step 3: Interpret the result

The rate of change (slope) of the function is 45-\frac{4}{5}.

So, the correct answer is:

45-\frac{4}{5}

Let me know if you want more details or have any questions!


Here are 5 related questions to deepen your understanding:

  1. What does a negative slope indicate about the direction of a line?
  2. How can you tell if two lines are parallel based on their slopes?
  3. What would the slope be if the line were horizontal?
  4. If a line passes through the origin, how does its slope affect the y-intercept?
  5. How would the slope change if we switched the points in the slope calculation?

Tip: Remember, slope tells us how much the y-value changes for a given change in x. It helps describe the "steepness" of a line.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope

Formulas

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

Theorems

Concept of rate of change in linear functions

Suitable Grade Level

Grades 8-10