Find the midpoint of ab with a(-3,12) and b(21,-8)

x=x2-x1/2 ; y=y2-y1
 utilizando esa formula y sustituyendo nos quedaria de la siguente manera x=2+3/2 ; y=-8-12/2
resolviendo las respuestas son x=5/2 ; y=-10

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