Math Problem Statement
.
Solution
To determine which equations best represent the graph, we need to analyze the line on the coordinate plane. Let's go through the key points to understand the slope and y-intercept of this line.
Step 1: Identifying the Slope
From the graph:
- The line passes through points and .
- Using these points, we can calculate the slope () as follows:
Step 2: Identifying the Y-Intercept
The y-intercept occurs when . Looking at the graph, we see that the line crosses the y-axis at . Thus, the y-intercept is .
Step 3: Writing the Equation
With a slope of and a y-intercept of , the equation of the line in slope-intercept form () is:
Step 4: Selecting the Correct Equations
We now look for equations equivalent to among the options:
-
Option A:
- Expanding:
- (This matches our equation.)
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Option D:
- This is exactly the equation we derived.
Thus, the correct answers are:
A and D
Would you like a detailed explanation of any step, or do you have further questions?
Here are five related questions for further exploration:
- How can we find the equation of a line given two points?
- What is the significance of slope in linear equations?
- How do transformations affect the equation of a line?
- How can we convert between different forms of a line equation?
- What are the characteristics of parallel lines on a graph?
Tip: When given a graph, always check the slope and y-intercept to find the line’s equation.
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Coordinate Geometry
Slope-Intercept Form
Point-Slope Form
Formulas
Slope formula: m = (y2 - y1) / (x2 - x1)
Slope-intercept form: y = mx + b
Point-slope form: y - y1 = m(x - x1)
Theorems
Slope-Intercept Theorem
Point-Slope Theorem
Suitable Grade Level
Grade 8
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