#### Answer

Formula for technology:
y= $\text{(x^2-1)/(x^2+1)}$
.

#### Work Step by Step

Formula for technology:
y= $\text{(x^2-1)/(x^2+1)}$
Build a table with the given values x, calculating the respective f(x).
Using technology to round to 4 decimal places:
- multiply the number by 10000 (move the decimal point 4 times)
- round to the nearest whole (round(1000*h(x))
- divide by 10000 (move the decimal point back 4 times
(as in the image)