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Mice21 [21]
3 years ago
11

Explain how to write a function rule from the table below. x :2 4 6 y :1 0 –1

Mathematics
2 answers:
horsena [70]3 years ago
6 0

To put it simple, y = 2 - 1/2 x

nydimaria [60]3 years ago
5 0
Our "y-intercept" (where x = 0) acts as the foundation of our function here.
We can extrapolate from what we have here...if x is 0, y is going to be 2.
So, we start at 2 for y, and every time we decrease x by 2, y increases by 1.
If we decrease x by just 1, y increases by ½.
This also goes in the opposite direction. Increase x by 1, decrease y by ½.
We can write the change in y as -½x.
That change is being added to our original value of 4, of course.
The equation of this line is y=-\frac{1}2x+2.
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