Can someone help me , Im struggling with this geometry question and it looks so simple but im so lost:( plz help

The parabola y = x² - 4 opens: a.) up b.) down c.) right d.) left

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex