Similarity geometry please

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Ac contractor is building a new subdivision outside of the city. he has started work on the first street and is planning on the other streets to run in a direction parallel to the first. the second street will pass through (-2,4) find the equation of the location of the second street in standard form. a.2x+y=2 b. x-y=2 c.2x+y=2 d. x+y=2

When only separate discreet points are graphed it is called?