Which transformation maps the graph of f(x) = x2 to the graph of g(x) = x2 + 3?

How do i do this activity, is appreciated

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.