Math Problem Statement
The line graphed on the grid represents the first of two equations in a system of linear equations.
If the graph of the second equation in the system passes through the points (−12,20) and (4,12) , which statement is true? A.The only solution to the system is (0,14) . B.The system has an infinite number of solutions. C.The system has no solution. D.The only solution to the system is (10,5) .
Solution
To determine the correct statement about the system of equations, we need to analyze the line formed by the two points given for the second equation: and .
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Calculate the slope (m) of the line connecting these points:
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Use the point-slope form to write the equation of the line: Using point : Simplifying:
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Examine the first line (represented by the graph). We need to check its slope and y-intercept to see if the lines are parallel, coincident, or intersecting.
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Analysis:
- If the slopes are the same and the y-intercepts are different, the system has no solution (the lines are parallel).
- If the slopes are different, there will be exactly one solution (the lines intersect).
- If the slopes and y-intercepts are the same, there are infinite solutions (the lines are coincident).
Conclusion:
- Without the graph of the first equation, we cannot definitively determine the relationship between the two lines.
- However, if you check the slopes and the intercepts, you can conclude which statement is true.
From the options:
- A: (0, 14) could be a solution if it lies on both lines.
- B: Infinite solutions occur if both equations represent the same line.
- C: No solution if the lines are parallel.
- D: (10, 5) could also be a solution depending on the first line.
To decide: Check the first equation's slope and intercept against .
Do you have the equation for the first line, or can you provide more details about the graph?
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Slope-Intercept Form
Systems of Equations
Formulas
Slope formula m = (y2 - y1) / (x2 - x1)
Point-slope form y - y1 = m(x - x1)
Theorems
Parallel lines have equal slopes
Intersecting lines have different slopes
Coincident lines are the same line
Suitable Grade Level
Grades 7-9
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