Math Problem Statement

Find the equation of the linear function represented by the table below in slope-intercept form: x: -1, 1, 3, 5 y: 0, -4, -8, -12

Solution

To find the equation of the linear function represented by the table, we need to follow these steps:

  1. Determine the slope (m): The slope of a linear function is given by the formula: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Let's take two points from the table:

    • Point 1: (1,0)(-1, 0)
    • Point 2: (1,4)(1, -4)

    Using the slope formula: m=401(1)=42=2m = \frac{-4 - 0}{1 - (-1)} = \frac{-4}{2} = -2 So, the slope m=2m = -2.

  2. Find the y-intercept (b): We will use the slope-intercept form of a linear equation: y=mx+by = mx + b Now, substitute one of the points into this equation to solve for bb. Using the point (1,0)(-1, 0): 0=2(1)+b0 = -2(-1) + b 0=2+b0 = 2 + b b=2b = -2

  3. Write the equation: Now that we have the slope m=2m = -2 and the y-intercept b=2b = -2, the equation of the line is: y=2x2y = -2x - 2

Would you like more details, or do you have any questions about this solution?

Here are 5 related questions to explore:

  1. How do you find the slope from two points on a line?
  2. How do changes in the slope affect the steepness of the graph?
  3. What does the y-intercept represent on a graph?
  4. How can you verify if a set of points lies on a specific line?
  5. How would the equation change if the line had a positive slope?

Tip: Always verify your calculated equation by substituting points from the table back into the equation to check for consistency.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

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

Theorems

Linear Function Theorem

Suitable Grade Level

Grades 7-9