Math Problem Statement

Find the slope, y-intercept, and equation of the line shown in the graph.

Solution

Let's analyze the graph to find the requested information: slope, y-intercept, and the equation.

Slope:

The line passes through two points that I can identify:

  • Point 1: (0,1)(0, 1)
  • Point 2: (3,2)(3, -2)

Using the slope formula m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}, where (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) are the coordinates of two points on the line: m=2130=33=1m = \frac{-2 - 1}{3 - 0} = \frac{-3}{3} = -1 So, the slope is 1-1.

Y-Intercept:

The y-intercept is the point where the line crosses the y-axis. From the graph, the line crosses the y-axis at (0,1)(0, 1). Therefore, the y-intercept is 11.

Equation:

Using the slope-intercept form of a linear equation, y=mx+by = mx + b, where mm is the slope and bb is the y-intercept: y=x+1y = -x + 1

Summary:

  • Slope: 1-1
  • Y-Intercept: 11
  • Equation: y=x+1y = -x + 1

Would you like more details or further clarifications?

Here are 5 related questions to expand on this:

  1. How do you calculate the slope from any two points on a line?
  2. What does a negative slope indicate about the direction of a line?
  3. How can you find the x-intercept from an equation in slope-intercept form?
  4. What is the relationship between slope and rate of change in real-world applications?
  5. How does the y-intercept affect the position of a line on a graph?

Tip: The slope-intercept form y=mx+by = mx + b is very useful for quickly graphing a line, as mm gives the steepness and direction, and bb gives the starting point on the y-axis.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Slope-Intercept Form

Formulas

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

Theorems

Slope-Intercept Theorem

Suitable Grade Level

Grades 7-9