Question

1. Complete the following tables for the equations:
   1. y = 5x – 7
   2. y = 9 – 3x
      Table 1

      x	−2	−1	0	1
      y		−12		−2
      (x,y)		(−1,−12)	(0,−7)

      
      Table 2

      x	−2	−1	0	1
      y	15			6
      (x,y)	(−2, 15)		(0,9)

2. On the same grid, draw the graphs of: 
   1. y = 5x – 7
   2. y = 9 – 3x
3. Use your graphs to solve the following simultaneous equations. 
   5x – y = 7
   3x + y = 9

Answer 1

1.  
   Table 1

   x	−2	−1	0	1
   y	−17	−12	−7	−2
   (x,y)	(−2, −17)	(−1,−12)	(0,−7)	(1,−2)

   
   Table 2

   x	−2	−1	0	1
   y	15	12	9	6
   (x,y)	(−2, 15)	(−1,12)	(0,9)	(1,6)

2.  
   
3. solution point of intersection
   x=2
   y=3