1. FINDING GRAPH NAMES WHEN GIVEN CO-ORDINATES SLIDESHOW 30, MATHEMATICS MR RICHARD SASAKI, ROOM 307

2. OBJECTIVES Understand how to find the name of a graph when given its gradient and a pair of co- ordinates Understand how to find the name of a graph when given two pairs of co-ordinates

3. THE GRADIENT We can see that the line goes through (-1, -1) and (0, 2) clearly so we can make a gradient triangle. 1 3

4. A PAIR OF CO-ORDINATES What if instead of having the y-intercept, we have a pair of co-ordinates? 1 3 If we know the gradient is 3 and the line passes through (-1, -1), how do we find the graph name with just this?

5. A PAIR OF CO-ORDINATES 1 3

6. EXAMPLE Let’s try another example, this time with no graph.

7. ANSWERS

8. TWO PAIRS OF CO- ORDINATES

9. EXAMPLE