Easiest way to solve this is to try plugging in the values from the table into the equations
Let’s try y = x + 4
The first coordinates from the table says
(-9 , -5 )
-5 = -9 + 4
-5 = -5
They match, so y = x + 4 is the right answer. You can try plugging in the other variables if your still uncertain
Well, difference means subtractions so we need to subtract 2 and c
2-c
1/7x-6=3/7x+4
+6 +6
1/7x=3/7x+10
-3/7x -3/7x
-2/7x=10
x= -35
