Suppose f ( a ) = 64.25 and the average rate of change of f over the interval from x = a to x = a + 199 is 0.108. What is the value of f ( a + 199 ) ? (Hint: think of the average rate of change as a constant rate of change.)

Look at the following graph of the given equation. determine whether the equation is a function. explain why or why not.

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.

Can someone tell me if this is perpendicular? !