Linear Equations
· Linear equations are equations used to represent a straight line on a graph.
· It takes a pair of coordinates (x,y) to make the equation true.
· It is written as:
o Slope and y –intercept form (y = mx + b)
§ m is the slope
§ b is the y-intercept
§ b value is found by substituting m and one pair of co-ordinates that lie on the line.
§ the formula for slope is as follows:
· It takes a pair of coordinates (x,y) to make the equation true.
· It is written as:
o Slope and y –intercept form (y = mx + b)
§ m is the slope
§ b is the y-intercept
§ b value is found by substituting m and one pair of co-ordinates that lie on the line.
§ the formula for slope is as follows:
o Standard form: 0= ax + by + c
§ It is used to find the x-intercept and y-intercept of the equation.
§ y-intercept is found by substituting 0 for x.
§ x-intercept is found by substituting 0 for y.
§ It is used to find the x-intercept and y-intercept of the equation.
§ y-intercept is found by substituting 0 for x.
§ x-intercept is found by substituting 0 for y.