MATH HELP?! What's the rule for this function??

Question

x, y

--------

0, 1

1, 1.5

2, 2

3, 2.5

What's the rule??

Thanks for the help!

Answer 1

y = 0.5x + 1

Answer 2

y = x/2 + 1

As x goes up by ones, y goes up by halves, y must be something plus 1/2 of x.

It's easy to see what the something is from the first given pair.

Answer 3

x increases at 1, y at .5, they just start at different points, graph and youll see