The value of b is the y intercept or when the line crosses the y axis this only happens when the value of x=0 so just look for the ordered pair in the table with x=0 and y=b so if you had a table and saw (0,3) (x,y) so the point where x=0 is at point (0,3) y=3 therefor b=3
basically look for the matching y value for when x=0
The b value in y=mx+b is how many units up or down the y-axis you go from the origin. For example, if y=mx+2, you would move 2 units up, or if it was y=mx-3 you would move 3 units down.
