Can a function be discrete if it is linear?

To which sets of numbers does -12 belong? choose all answers that are correct. a) natural numbers b) integers c) real numbers d) irrational numbers

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal