There is a Linear relationship between two variables if a uniform change in the independent variable produces a uniform change in the dependent variable.
A linear relationship produces a linear graph (straight line).
A linear graph is represented by the equation
y = mx + b
Solving a Linear Equation:
A linear equation is a linear relationship where the dependent variable has a specific value. We can solve linear equations by finding the value of the independent variable.
A linear equation has only one solution.
A linear equation can be solved using equivalence.
Equivalence means the left hand side of the equation is equal to the right hand side. So we must do the same operation on both sides to maintain the equality of the equation.