Math Problem Statement
What is the equation of this line?
Solution
The problem asks for the equation of the line displayed in the graph.
Step-by-Step Explanation:
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Slope of the Line (m): The slope can be determined by observing the rise over run between two points on the line. Based on the graph:
- The line passes through the points (0, -2) and (2, 4).
- Slope .
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Y-Intercept (b): The line crosses the y-axis at . Thus, the y-intercept .
Using the slope-intercept form , we substitute and , giving us the equation:
Thus, the correct equation is , which matches the first option.
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Here are 5 related questions:
- How do you calculate the slope of a line if two points are given?
- What is the general formula for the slope-intercept form of a line?
- How do you find the equation of a line if you are given the slope and a point?
- What does the y-intercept tell you about the graph of a line?
- How can you tell the steepness of a line from its slope?
Tip: The slope indicates how steep a line is—larger slopes mean steeper lines, and negative slopes indicate a downward direction.
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Math Problem Analysis
Mathematical Concepts
Algebra
Linear Equations
Slope-Intercept Form
Formulas
Slope-intercept form: y = mx + b
Slope = rise/run
Theorems
Slope Formula
Y-Intercept
Suitable Grade Level
Grades 7-9