Question

please help with functions

Answer 1

Because y varies directly to x. We can therefore assume it is proportional to some constant \(\lambda\). That is:
$$y = \lambda x$$
Now we solve for lambda:
$$14 = \lambda (-4) \\
\lamda = -3.5$$
Now, using this, can you obtain your answer for #1?

Answer 2

Sorry, this is what I'm saying:
y = cx
14 = -4c
c = -3.5

Answer 3

Quite so.

Answer 4

Set up the same equation as I did. It's just a matter of proportionality and solving for that constant of proportionality