Math Problem Statement
Solution
The problem asks which of the provided graphs represents the equation , which is in point-slope form.
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Rewrite the equation into slope-intercept form: Distribute the 3: Add 2 to both sides to isolate : So the equation in slope-intercept form is , where the slope (m) is 3 and the y-intercept is -1.
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Identify the key characteristics:
- Slope: The line has a slope of 3, meaning it rises 3 units for every 1 unit it moves to the right.
- Y-intercept: The line crosses the y-axis at .
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Now check the graphs:
- Graph A: This line does not pass through .
- Graph B: This line has a slope of 3 and passes through the y-axis at . This is a good candidate.
- Graph C: This line does not have the correct slope.
- Graph D: This line has the correct slope but crosses the y-axis at , which is incorrect.
Thus, Graph B is the correct graph.
Would you like further details or have any questions?
Here are five follow-up questions you might consider:
- How do you convert a point-slope form equation to slope-intercept form?
- How can you determine the slope of a line from a graph?
- What is the general form of the point-slope equation?
- How can you find the y-intercept of a line from its equation?
- How would the graph change if the slope was negative?
Tip: When graphing a line, always start by identifying the slope and the y-intercept for easier plotting!
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Point-Slope Form
Slope-Intercept Form
Formulas
y - y1 = m(x - x1)
y = mx + b
Theorems
Slope-Intercept Form
Suitable Grade Level
Grades 8-10