What are you Plotting?
Problem
On a set of axes (like the ones below), plot all the points
which have an x coordinate of 3.
What do you notice about the position of all these points?
Now plot all the points which have a y coordinate of 5.
What do you notice about the position of these points?
Give the coordinates at the point where the two lines you have
drawn meet.
We call this the point of intersection of the lines.
Now look at the set of axes above. What do all the points on the
blue line have in common?
Name 3 points on the green line.
What are the coordinates of the point which is on both the red and
yellow lines?
Which line would the point (17,4) be on?
Getting Started
If you joined up all the points with an x coordinate of 3, what would you have?
Student Solutions
Alice from Tattingstone School sent us this solution:
| 1. They are horizontal 2. They are vertical |
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| 3. (3,5) 4. They all have 10 something like (10,7) and there are all on a horizontal line 5.(7,1), (7,2), (7,3). 6. (1,4). 7. It will be on the yellow line. |
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