I have been asked if there's a way to turn positive slope into a negative slope.

My answer is: Yes, if you turn the chart upside down.

Is my answer correct or am I being sarcastic?

Theoretically turning it upside down would still give you the positive slope.

Although yeah you are being sarcastic.

If a line has a positive slope, the same line can't

also have a negative slope. To produce a line that

has a negative slope, you can rotate the chart 90o clockwise.

you can turn it upside down and it would be a positive slope. or your line can be xy = 2^2

You are correct.