a) Rise/run=2/3=slope. Point is x=4 and y=8.
y-8=(2/3)(x-4), slope-point form of line,
y=2x/3-8/3+8=2x/3+16/3, y=⅔(x+8) is the equation of the line. Two more ordered pairs: (0,16/3), (-8,0).
Also: (1,6), (7,10).
b) Rise/run=5/1=5. Point is x=-2, y=-3.
y+3=5(x+2),
y=5x+10-3=5x+7, so y=5x+7 is the equation of the line. Two more ordered pairs: (0,7),(-7/5,0). Also: (-1,2), (1,12).