In the game activity, Guess My Rule, you give your students the x value of a linear function and have them find the y-value.
They need to determine the rule that you have in mind to get the correct y-value.
No one is allowed to share their rule until the end.
For the rule to be established, the teacher must provide two initial x and y pairs.
Here are some suggestions for implementing this warm-up activity:
Present one pair of x,y values and let students guess the y for the second x.
Do not present the x-values in numerical order.
Have a goal in mind for your rules. Perhaps present the rule in the form y = mx + b.
When half the class seems to know the rule, make the x-value a fraction or a negative number to challenge them.
Steps:
- Present the initial pair of values.
- Enter the next x-value and have students suggest the y-value.
- Enter the correct y-value and caution the students not to give up the rule.
- Continue in this manner until at least half of the class appears to know the rule.
- To make it possible for more students to access the rule, make a new table and this time order the values of x.
Now more students will be able to determine the y-value because there will be a pattern.
- Have the students share their rules. Record them as word or symbol rules.
What's My Rule (With Circles)
When studying circles, I give several coordinate pairs and have my students guess the equation of the circle that I have in mind.
Example #1:
X | Y |
---|---|
2 | 0 |
-2 | 0 |
0 | 2 |
0 | -2 |
What's My Rule?
Example #2:
X | Y |
---|---|
5 | 3 |
4 | 4 |
-3 | -3 |
1 | -5 |
5 | -3 |
-4 | 0 |
1 | 5 |
6 | 0 |
What's My Rule?