Question

How do you graph the function `xy + 16 = 0`?

Answer 1

For a collection of values of `x_i` solve for `y_i)`; plot the pairs `(x_i,y_i)` and connect. Note neither `x` nor `y` can equal `0`

Explanation:

Sample plot values:
#color(white)("XXX"){:(x," ",y), (-8,,+2), (-4,,+4), (-2,,+8), (-1,,+16), (+1,,-16), (+2,,-8), (+4,,-4), (+8,,-2) :}#

graph{-16/x [-22.8, 22.83, -11.4, 11.4]}