Answer:
1a: A,D
1b: See the graph below
1c: Three solutions
2. y = 2x
Explanation:
1a: Use elimination method to discard options
B) If x=4 then y=11, which is wrong.
C) If x= -1 then y=1, which is wrong.
The values in the table matches for y=2x+3.
1b: Substitutiong values in the respective equations, we get the following tables:
x= -2, 0, 1 then y= 3, -1, 5
x=0, 1, 5 then y= 1/2, 0, -2
For the graph , you can see the figure shown.
1c: From the graph, it is clear that there are three solutions of these equations, namely (0,3), (0,1/2), (-1,1).
2: The graph of equation y=2x is parallel to the graph of y=2x+3 and hence, they will have no common solution.