Answer:
15) already in slope-intercept form
16) y=-6+1/3x
17) y=-7/3x-3
18)y=-1/3x+0
Explanation:
15) is already in slope intercept form
16) first you subtract x on both sides so x-3y=18 will be
-3y=18-x
then you divide by -3 on both sides to isolate y so -3y=18-x will be
and thats the final answer
17) y=-7/3x-3
find the slope by counting rise over run and the y intercept is when x is zero so -3
18)y=-1/3x+0