Question 11
Question: Draw the graph of 3x+2y=6.
Answer: 
Question 12
Question: Draw the graph of 3x-2y=9.
Answer: 
Question 13
Question: Draw the graph of 3x+y=12.
Answer: 
Question 14
Question: Draw the graph of 2x-3y=12. Use the graph to find the slope of line and area between the axes.
Answer: 2x-3y=12
2x=12+3y
y=0, x=6
y=-2, x=3
y=-4, x=0
Question 15
Question: Draw the graph of 2x+y=5. Use the graph to find the slope of line and area between the axes.
Answer: 2x+y=5
y=5-2x
x=0, y=5
x=2, y=1
x=3, y=-1
Question 16
Question: Draw the graph of 4x+3y-6=0.
Answer: 4x+3y-6=0
3y=6-4x
x=0, y=2
x=3, y=-2
x=-3, y=6
Question 17
Question: Solve graphically
2x-2=y; x+3y=15
Answer: 2x-2=y
y=2x-2
At x=0, y=2(0)-2=-2
At x=1, y=2(1)-2=0
At x=2, y=2(2)-2=2
x+3y=15
x=15-3y
At y=5, x=15-3(5)=0
At y=4, x=15-(3)4=3
At y=6, x=15-3(6)=-3
x=15-3y
At y=5, x=15-3(5)=0
At y=4, x=15-(3)4=3
At y=6, x=15-3(6)=-3
Question 18
Question: Solve graphically
Answer: x=4
x=4; is a line parallel to y axis.
3x+2y=10
3x=10-2y
Solution: x=4, y=-1
Question 19
Question: Solve graphically
3y=5-x; 2x=y+3
Answer: 3y=5-x
2x=y+3
3y=5-x
2x=y+3
Question 20
Question: Solve graphically
3x+y+1=0; 2x-3y+8=0
Answer: 3x+y+1=0
3x+y=-1
3x=-1-y
2x-3y+8=0
2x+8=3y
2x=3y-8
Solution: x=-1 and y=2
