If i walk 3/8 + 1/8 and i would like to walk 1 mile, of still need to walk to reached.

3/8+1/8=4/8 of a mile. 4/8 of a mile=1/2 of a mile. 1 - 1/2 of a mile= 1/2 of a mile.

You have walked 3/8 + 1/8 = (3+1)/8 = 4/8 of a mile. There are 8 eighths in a mile, so you need to walk 8/8 -4/8 = (8 -4)/8 = 4/8 mile more.

The fraction can be reduced from 4/8 to 1/2. You need to walk 1/2 mile more.

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for