Question

{A number line from negative 10 to 10 with tick marks every 1 unit. A closed dot is at negative 3 with a ray pointing left from negative 3.] The variable must have a coefficient that is a negative fraction.

Answer 1

Draw a number line from -10 to +10 with tick marks (division lines) every 1 unit.  Now find the origin (in the middle of the line you have just drawn).  Now move your pencil point 3 units to the left and plot a dark (closed) dot there.  Then draw a ray from that closed dot to the left.  Apparently we cannot extend that ray beyond -10.

(-10,-3] would be my representation of this situation.