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 ()
The slope is defined as the change in over the change in :
From the graph:
- Two clear points on the line are (the y-intercept) and .
Now, calculate the slope:
Step 2: Identify the y-intercept ()
From the graph, the line crosses the y-axis at . Hence, the y-intercept is:
Step 3: Write the equation of the line
Using the slope-intercept form , we have:
Final Answer
Do you have any questions or would you like more explanation?
Here are 5 related questions you can explore for practice:
- What is the slope of a line perpendicular to this one?
- How do you find the x-intercept of a line?
- If the y-intercept was changed to -3, how would the equation change?
- How can you rewrite the equation in standard form ?
- 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