
Meagan W. answered 08/21/13
Biology, Mathematics and Statistics Tutoring
A linear equation is any equation in the form y = mx+b. It can be drawn on a graph as a straight line.
where:
"y" represents the y-axis
"x" represents the x-axis
"m" is the slope of the line
"b" is the y-intercept
So, y = x is a linear equation with a slope of 1 and a y-intercept of 0. This graph passes through the points (0,0) (1,1) ...
If you change the equation to y = x+2 then the slope is still 1 but the y-intercept is 2.
If you change the equation to y = 2x then the slope is now 2 and the y-intercept is 0.