7 = 14x - 42y
42y = 14x - 7
y = (14x - 7)/ 42
or we could write it as y = (1/3)x - 1/6
#1: y= 0.5+3 x
which means that x= y/3 - 0.5
#2: y= 3(0.5) x
which means that y= 1.5 x
that means x = y/1.5
Hope it can help
Answer:

Step-by-step explanation:
slope=(y2-y1)/(x2-x1)
7-5/9-4
2/5