Answer:
The answer that gives the best estimate is (1,1) 
Step-by-step explanation:
i) As can be seen on of the lines intercepts the y axis at (0,-1). So the y 
  intercept or  = -1. Therefore the equation for this line can be written as
 = -1. Therefore the equation for this line can be written as 
  y =  x +
 x +  ⇒    y =
    ⇒    y =  x - 1 . It can also be seen from this graph that the
 x - 1 . It can also be seen from this graph that the 
  line passes through the point (2 , 2). Substituting these values for x and y  
  respectively we get  2 = 2 - 1    ∴
 - 1    ∴  =
 =  .  The equation of the first line
.  The equation of the first line 
  can be written as y =  x - 1   ⇒ 2y - 3x = -2
 x - 1   ⇒ 2y - 3x = -2 
ii) As can be seen on the other line the intercept on the y axis is at (0,2). So 
   the y  intercept or  = 2. Therefore the equation for this line can be
 = 2. Therefore the equation for this line can be   
   written  as  y =  x +
x +  ⇒    y =
    ⇒    y =  x + 2 . It can also be seen from this
 x + 2 . It can also be seen from this   
    graph that  the  line passes through the point (1 , -1). Substituting these 
    values for x and  y   respectively we get  1 = 1 + 2    ∴
 + 2    ∴  = -1 .  The
  = -1 .  The 
    equation of the second line  can be written as y = - x + 2   or x + y = 2
iii) Solving the two equations of the two lines respectively as found in i) and 
   ii)  we get y = 0.8. We multiply equation in ii) by 3 to get 3x + 3y = 6 and  
   when we add this to equation in i) we get 5y = 4 which means that y = 0.8. 
   If we substitute this value in ii) we get 0.8 + x = 2 , therefore x = 1.2.
iv) Therefore we get the solution of the two lines, which is the intersection 
     of the two lines as (1.2, 0.8). So the answer that gives the best estimate 
     is (1,1)