Math Problem Statement

Find the equation of the line graphed.

Solution

To find the equation of the line shown in the graph, follow these steps:

Step 1: Identify the slope (mm)

The slope is defined as the change in yy over the change in xx:
m=y2y1x2x1m = \frac{y_2 - y_1}{x_2 - x_1}

From the graph:

  • Two clear points on the line are (0,2)(0, 2) (the y-intercept) and (2,0)(2, 0).

Now, calculate the slope: m=0220=22=1m = \frac{0 - 2}{2 - 0} = \frac{-2}{2} = -1

Step 2: Identify the y-intercept (bb)

From the graph, the line crosses the y-axis at y=2y = 2. Hence, the y-intercept is: b=2b = 2

Step 3: Write the equation of the line

Using the slope-intercept form y=mx+by = mx + b, we have: y=x+2y = -x + 2

Final Answer

y=x+2\boxed{y = -x + 2}

Do you have any questions or would you like more explanation?
Here are 5 related questions you can explore for practice:

  1. What is the slope of a line perpendicular to this one?
  2. How do you find the x-intercept of a line?
  3. If the y-intercept was changed to -3, how would the equation change?
  4. How can you rewrite the equation in standard form Ax+By=CAx + By = C?
  5. What are the conditions for two lines to be parallel?

Tip: The slope of a line determines its steepness and direction—positive slopes go up, while negative slopes go down from left to right.

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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

Properties of Linear Equations

Suitable Grade Level

Grades 7-9