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Mind Map: Linear Equations in Two Variables | Mathematics (Maths) Class 10

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FAQs on Mind Map: Linear Equations in Two Variables - Mathematics (Maths) Class 10

1. What are linear equations in two variables?
Ans. Linear equations in two variables are mathematical equations that can be expressed in the form \( ax + by = c \), where \( a \), \( b \), and \( c \) are constants, and \( x \) and \( y \) are the variables. The graph of such equations is a straight line in a two-dimensional coordinate system.
2. How do you graph a linear equation in two variables?
Ans. To graph a linear equation in two variables, you can follow these steps: 1. Write the equation in slope-intercept form \( y = mx + b \), where \( m \) is the slope and \( b \) is the y-intercept. 2. Plot the y-intercept on the graph. 3. Use the slope to find another point on the line. For example, if the slope is \( \frac{rise}{run} \), move up or down (rise) and left or right (run) from the y-intercept. 4. Draw a line through the points to complete the graph.
3. What methods can be used to solve linear equations in two variables?
Ans. There are several methods to solve linear equations in two variables, including: 1. Graphical Method: Plotting both equations on a graph to find the point of intersection. 2. Substitution Method: Solving one equation for one variable and substituting that value into the other equation. 3. Elimination Method: Adding or subtracting the equations to eliminate one of the variables, making it easier to solve for the other variable.
4. What is the significance of the slope in a linear equation?
Ans. The slope in a linear equation represents the rate of change of the dependent variable (usually \( y \)) with respect to the independent variable (usually \( x \)). It indicates how steep the line is and the direction it is going: a positive slope means the line rises as it moves from left to right, while a negative slope means it falls.
5. Can a linear equation in two variables have no solution?
Ans. Yes, a linear equation in two variables can have no solution. This occurs when the two equations represent parallel lines that never intersect. In such cases, the equations are inconsistent, meaning there are no values for \( x \) and \( y \) that satisfy both equations simultaneously.
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