Who does a united states senator represent?

A US Senator represents his whole state. 

There are two senators from every state, no matter how many people
live in the state.  100 Senators for the whole USA.

In the House of Representatives, each representative is supposed to
represent a district with the same number of people as the other districts. 
So states with bigger population have more representatives in the House.
435 representatives altogether in the House.

d

step-by-step explanation:

an inequality is an expression which means more than one number is a solution. we graph the solutions on a number line to show all possible values. we graph using circles and arrows.

equal to and less/greater than are graphed with filled in circles on the value.only less/greater than (not equal to) are graphed with open (not filled in) circles on the value.we draw an arrow the direction the solutions satisfy the inequality. generally this is the direction the inequality itself points.

this is a filled in circle on -2 so this is . this means only answers c and d are options.

answer d points to the right.