You need to turn this equation....into something that looks like y = mx + b *notice the 'y' is by itself on the left side...so how would you get 'y' by itself on the left side in your equation?
alternative : if given a straight line ax + by = c, then the slope always m = -a/b
Actually, just to make it easier on this exact question...use what RadEn has shown. You have an equation ax + bx = c to find the slope.... you do slope = -a --- b So your equation, what is 'a' and what is 'b'? 6x + 8y = 12