Math Problem Statement

Write the equation of the line in slope-intercept form.

Solution

To solve this problem, we need to find the equation of the line in slope-intercept form, which is given by:

y=mx+by = mx + b

Here, mm is the slope, and bb is the y-intercept (the point where the line crosses the y-axis).

Step 1: Determine the slope (mm)

To calculate the slope, we use the formula:

m=riserunm = \frac{{\text{rise}}}{{\text{run}}}

By observing the graph, we can see two points where the line crosses grid intersections. Let's assume the line passes through the points:

  1. (2,3)(-2, -3)
  2. (0,1)(0, -1)

Using these points, the rise (change in y) is:

rise=1(3)=2\text{rise} = -1 - (-3) = 2

The run (change in x) is:

run=0(2)=2\text{run} = 0 - (-2) = 2

Thus, the slope is:

m=22=1m = \frac{2}{2} = 1

Step 2: Find the y-intercept (bb)

The line crosses the y-axis at the point (0,1)(0, -1), which means the y-intercept bb is 1-1.

Step 3: Write the equation

Substituting the slope (m=1m = 1) and y-intercept (b=1b = -1) into the slope-intercept form:

y=1x1or simplyy=x1y = 1x - 1 \quad \text{or simply} \quad y = x - 1

Conclusion:

The correct equation is not listed among the given choices. The correct equation should be:

y=x1y = x - 1

Would you like more details or have any questions?

5 Related Questions:

  1. How do you find the slope of a line from a graph?
  2. What is the importance of the y-intercept in the equation of a line?
  3. How do you recognize when a line has a negative slope?
  4. How would the equation change if the line had a steeper slope?
  5. What are the different forms of a line's equation besides slope-intercept?

Tip:

When finding the slope from a graph, always pick two clear points that lie exactly on the grid lines for accurate calculation!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slope-Intercept Form

Formulas

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

Theorems

-

Suitable Grade Level

Grades 8-10