The answer for that would be -9
To see if it’s linear use a pencil and see if any lines touch more than one point (just look up pencil line test) and 1-4 just draw out a graph (and since it goes up to hundred don’t count by 1s count by 10 or or something
Hope you kind of get the idea sorry I’m not the best at explaining stuff :)
The second one, K
![\leq](https://tex.z-dn.net/?f=%20%5Cleq%20)
-15
because, for us to get a positive number in a fraction, when the denominator in negative, the numerator must also be negative.
so, -15, or anything less than -15 (when put into the numerator) will be equal to or greater than 3
Hope this helps!:)