What is the name of the point that partitions the directed segment into ratio 1:1

Look at this expression. a3b3c a-3b-3c-1 which of the following is the simplest form of the expression above?

Asap describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x). f(x)=-5.8sin x. g(x)=sin x. a: vertical stretch by a factor of 5.8, reflection across y-axis. b: vertical stretch by a factor of 5.8,reflection across x-axis. c: horizontal stretch by a factor of 5.8, reflection across x-axis. d: horizontal stretch by a factor of 5.8 reflection across y-axis.

Does anyone know how to do geometryme with this problem