(16,3) ,(16,-80) is it zero slope undefind slope negative slope or positive slop

Polygon abcde is reflected to produce polygon a′b′c′d′e′. what is the equation for the line of reflection?

Yahir designs bracelets. he uses between 9 and 15 red and yellow beads in the ratio of 2 red bead to 5 yellow beads. drag the beads into the container to meet these requirements

Find solution of the linear equation y = 2/3x + 1/3