Math Problem Statement

Please analyze the graph showing a straight line with a negative slope.

Solution

The graph you uploaded shows a straight line, and it appears to follow a negative slope. Let's analyze the key features of this line:

1. Slope:

  • The slope is negative, as the line is decreasing from left to right.
  • We can find the slope by picking two points on the line. From observation, two easily identifiable points are approximately at (12,12)(-12, 12) and (4,4)(4, -4).
  • The slope mm is calculated using the formula: m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1} Substituting the points (12,12)(-12, 12) and (4,4)(4, -4): m=4124(12)=1616=1m = \frac{-4 - 12}{4 - (-12)} = \frac{-16}{16} = -1

2. Y-intercept:

  • The line crosses the y-axis at approximately (0,0)(0, 0), which means the y-intercept is b=0b = 0.

3. Equation of the Line:

  • Using the slope-intercept form of the equation of a line y=mx+by = mx + b, with m=1m = -1 and b=0b = 0, the equation of the line is: y=xy = -x

Summary:

  • Slope: 1-1
  • Y-intercept: 00
  • Equation: y=xy = -x

Would you like more details on any of these calculations or explanations?

Related Questions:

  1. How do you calculate the slope if the points on the graph are less clear?
  2. What does the slope of a line tell you about its direction and steepness?
  3. How can we confirm the accuracy of the equation of a line?
  4. What happens if the y-intercept changes but the slope remains the same?
  5. How do you find the x-intercept of a line?

Tip:

When determining the equation of a line, the slope is key to understanding how quickly the line rises or falls, while the y-intercept tells you where the line crosses the vertical axis.

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Math Problem Analysis

Mathematical Concepts

Slope of a line
Y-intercept
Linear equations

Formulas

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

Theorems

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Suitable Grade Level

Grades 7-12