It is an algebraic expression in the two variables, x and y.
you gust multiply the 4 by -y time 8 x. then plot x by the -4 coordinate
if you mean 3x + 4y = 8 the slope is -3/4 and any parallel line will have the same slope.
5x 4y8' means nothing in terms of coordinate geometry nor algebra. However, if you mean 5x + 4y = 8 Then we can determine the slope. Subtract '5x' from both sides Hence 4y = -5x + 8 Divide both sides by '4' Hence y = (-5/4)x + 8/4 y = (-5/4)x + 2 The slope/gradient is '-5/4'.