Question

What does y=mx+b mean

Answer 1

Y = mx + b is the equation for a straight line. "B" is the point value of where the line intercepts the y axis, called the y intercept. "M" is the value of the slope of the line.

Answer 2

The answer to this question is that y=mx+b is the slope-intercept form of an equation of a line that is graphed in the xy-plane. m is the quantity defined as
                          m = rise/run = Δy/Δx = (y2-y1)/(x2-x1)
with (x1,y1) and (x2,y2) as points on the line. b is the quantity defined as the y-intercept, that is, the y-value of where the line crosses the vertical y-axis.