5783637589Now you write a five-digit number below it in such a way that each digit is 9 minus digit above. You now have...578363758962410Ask the person to add one more 5-digit number. If he adds 54732,......
below his original number. Suppose he writes 37589.
So you now have...
57836
37589
Now you write a five-digit number below it in such a
way that each digit is 9 minus digit above. You now have...
57836
37589
62410
Ask the person to add one more 5-digit number. If he
adds 54732, you add below it 45267. Note that you decided
the number by subtracting each of his digit from 9.
Thus, you now have.....
57836
37589
62410
54732
45267
Next, ask him to add all the number and he gets 257834
Show him the number which you had written as an answer
to this addition earlier in the folded paper and surprise him.
"Explain how to determine if a give relation is a function. "
Every x value must have exactly one y value associated with it. This means a graph of a function will pass the vertical line test. To pass the vertical line test it must be impossible to draw a vertical line that passes through more that one point on the curve.
Here is a system of points (x,y) that is a function:
(1,1),(2,2),(3,3),(4,4),(5,5)
Put it into a table and you've got your table for the question.
Now just for the hell of it let's look at one that isn't a function:
(1,1),(2,2),(3,3),(5,4),(5,5)
Note that x=5 has two y values associated with it 4 and 5. This means it's not a function.
For the graph portion, graph:
y = x^2
For the equation portion:
y = √x
Will work.
