Fill in the blank with the phrase that makes the proof statement true. lines a and b are parallel. because vertical angles are congruent. a. angle 1 is congruent to angle 3 b. angle 2 is congruent to angle 3 c. angle 1 is congruent to angle 2 d. lines a and b are parallel

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks