Question

How do you graph `y=-3 sec x`?

Answer 1

We want a graph of the function:

`y=-3secx`

We start with a graph of the function `y=secx`
graph{secx [-10, 10, -10, 10]}

We scale it by a factor `3` along `Oy` to get the graph of the function `y=3secx`
graph{3secx [-10, 10, -10, 10]}

Then we reflect it in `x`-axis to get a graph of the function `y=-3secx`
graph{-3secx [-10, 10, -10, 10]}