Math Problem Statement

Find the slope, y-intercept, and the equation of the line from the given graph.

Solution

The graph you've uploaded depicts a straight line on a coordinate plane. To analyze this, I'll describe some key characteristics:

1. Slope:

The slope of a straight line is the ratio of the vertical change to the horizontal change between two points on the line. The line appears to slope downward from left to right, indicating a negative slope.

To calculate the slope (m), we can use two clear points from the graph:

  • One point: (-6, 6)
  • Another point: (4, -2)

The slope formula is: m=y2y1x2x1m = \frac{{y_2 - y_1}}{{x_2 - x_1}} Substituting: m=264(6)=84+6=810=45m = \frac{{-2 - 6}}{{4 - (-6)}} = \frac{{-8}}{{4 + 6}} = \frac{{-8}}{{10}} = -\frac{4}{5}

Thus, the slope is -4/5.

2. Y-Intercept:

The y-intercept is where the line crosses the y-axis. From the graph, the line crosses the y-axis at (0, 2). Hence, the y-intercept is 2.

3. Equation of the Line:

The equation of a straight line in slope-intercept form is: y=mx+by = mx + b Where:

  • mm is the slope,
  • bb is the y-intercept.

Substituting m=45m = -\frac{4}{5} and b=2b = 2: y=45x+2y = -\frac{4}{5}x + 2

This is the equation of the line shown on the graph.


Would you like further details on how this was derived or have any specific questions?

Here are 5 follow-up questions to consider:

  1. How does the slope affect the direction of a line?
  2. What is the significance of the y-intercept in a linear equation?
  3. How would the graph change if the slope were positive?
  4. What would the line look like if the slope were zero?
  5. How can you find the x-intercept from a linear equation?

Tip: Remember, the slope indicates how steep a line is, while the y-intercept tells us where the line crosses the y-axis!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Linear Equations
Slope
Y-Intercept

Formulas

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

Theorems

-

Suitable Grade Level

Grades 8-10