Using the standard slope-intercept form for an equation of a line y = mx + b
where m is the slope and b the y-intercept.
Find the equation of the line through
(6,8) m = -4/-3 = 4/3
y = (4/3)x + b ||using Pt (3,4) to solve fo b
4 = 4 + b
0 = b
y = (4/3)x