1. Drawing straight line graphs
Tuesday, 01 January 2019

2. Copy and complete the table below for the equation y=2x+1
Example
Copy and complete the table below for the equation y=2x+1
Draw the graph of y=2x+1 x 1 2 3 4 y 1 3 5 7 9 y 6 4 2 -2 -1 1 2 3 x -2

3. Copy and complete the table below for the equation y=3x-1
Example
Copy and complete the table below for the equation y=3x-1
Draw the graph of y=3x-1 x 1 2 3 4 y 2 5 8 11 y 8 6 4 2 -2 -1 1 2 3 x -2

4. Copy and complete the table below for the equation y=4x-5
Example
Copy and complete the table below for the equation y=4x-5
Draw the graph of y=4x-5 x 1 2 3 y –1 3 7 y 8 6 4 2 -2 -1 1 2 3 x -2

5. Example Draw the graph of y=2x-7 x1 2 3 y –5
– 3 –1 y 4 2 -2 -1 1 2 3 x -2 -4 -6 -8

6. Example Draw the graph of y=4-x x1 2 3 y 3 2 1 y 8 6 4 2 -2 -1 1 2 3 x -2

7. b) Hence solve the set of simultaneous equations y=2x+5 and y=20-3x
Example a) Draw on the same set of axes the graphs of y=2x+5 and y=20-3x
b) Hence solve the set of simultaneous equations y=2x+5 and
y=20-3x y x 1 2 3
y=2x+5 7 9 11 25 x 1 2
y=20-3x 20 20 17 14 15
b) Solution of simultaneous equations
x= 3
y=11 10 5 1 2 3 4 5 x