Question

liner equation meaning

Answer 1

A linear equation is a mathematical expression that represents a straight line when graphed on a coordinate plane. It typically has the form:

\[ ax + by = c \]

where:
- \( x \) and \( y \) are variables,
- \( a \), \( b \), and \( c \) are constants (with \( a \) and \( b \) not both zero).

In this equation:
- \( a \) and \( b \) determine the slope of the line,
- \( c \) indicates where the line intersects the axes.

### Key Characteristics of Linear Equations:

1. **Degree**: Linear equations are first-degree equations, meaning the highest exponent of the variables is 1.
2. **Graph**: The graph of a linear equation is a straight line.
3. **Slope**: The slope is a measure of how steep the line is and is given by the ratio \(-\frac{a}{b}\) when expressed in standard form.
4. **Intercepts**: Linear equations can be used to find the x-intercept (where \( y = 0 \)) and y-intercept (where \( x = 0 \)).

### Examples:

1. **Standard Form**: \( 2x + 3y = 6 \)
2. **Slope-Intercept Form**: \( y = mx + b \) where \( m \) is the slope and \( b \) is the y-intercept (e.g., \( y = 2x + 1 \)).

### Applications:
Linear equations are widely used in various fields such as physics, economics, and statistics to model relationships between variables.