Math Problem Statement
Solution
Let's solve this system of linear equations and match it with the graph provided.
The equations are:
Step 1: Graphing the first equation
The equation is in slope-intercept form, , where:
- (slope)
- (y-intercept)
To graph this:
- The line passes through on the y-axis.
- The slope means for every 3 units moved to the right, the line moves up by 2 units.
Step 2: Graphing the second equation
The second equation is also in slope-intercept form, where:
- (slope)
- (y-intercept)
To graph this:
- The line passes through on the y-axis.
- The slope means for every 1 unit moved to the right, the line moves down by 2 units.
Step 3: Finding the intersection point
Now, solving these equations algebraically to find the intersection (solution):
Set the two equations equal to each other: To eliminate the fraction, multiply the entire equation by 3: Now, combine like terms: Solve for :
Substitute back into one of the original equations (I'll use ):
Thus, the solution is , meaning the two lines intersect at the point .
Matching with the graph:
From the graph, we observe that the lines intersect at approximately , confirming that the graph corresponds to this system of linear equations.
Would you like more details or have any questions?
Here are 5 questions related to this:
- How do you find the slope of a line from an equation?
- What is the graphical meaning of the slope in a linear equation?
- Can two lines have the same slope but different y-intercepts? What happens in this case?
- How do you solve a system of equations by substitution or elimination?
- What are the conditions for a system of linear equations to have no solution?
Tip: When graphing a linear equation, always start by plotting the y-intercept and then use the slope to plot additional points.
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Graphing Systems of Equations
Slope-Intercept Form
Formulas
y = mx + b (Slope-Intercept Form)
Solving Systems by Substitution or Elimination
Theorems
Slope-Intercept Theorem
Intersection of Lines in a System of Equations
Suitable Grade Level
Grades 8-10
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