If you have a table that's shows a linear relationship, when can you read the value for b, in y=mx b, directly from the table without drawing a graph or doing any calculations? explain.

B is the y intercept
this means when the line crosses the y axis
the only time this happens is when x=0
so find the ordered pair on the graph that is x=0 and y=b or (0,b)

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm