2. Give your own example of a function using a set of at least 4 ordered pairs. The DOMAIN will be
any four integers between 0 and +10. The RANGE will be any four integers between -12 and 5.
Example of function f(x) = -2x
Domain value Range value
X=0
f(0) = y = -2(0) = 0
X=1
f(1) = y = -2(1) = -2
X=2
f(2) = y = -2(2) = -4
X=3
f(3) = y = -2(3) = -6
The four pairs are (0,0) (1,-2) (2,-4) and (3,-6)
3.Explain why your example models a function.
It is a model of straight line function with a slope of negative 2.
It means the relations between the x and y values are by a multiple of -2.
4. Give your own example of at least 4 ordered pairs that DOES NOT model a function. The DOMAIN
will be any four integers between 0 and +10. The RANGE will be any four integers between -12 and +5.
To form a non function, we can make four arbitrary points and make sure no relation can be formed.
The four pairs are (0,0) (1,-5) (2,-3) and (3,0)
5. Explain why your example DOES NOT model a function.
From the above four points, the lines are zig-zag and there is no relation between x and y values.