23/27 because 46/54 diveded by 2 equals 23/27 which can not be simplified any further
A. -5/3 and b -9/7. the formula is y2-y1 and x2-x1
Go to where 30 degrees is on the unit circle and find the y-coordinate. That is sin30.
a.
has an average value on [5, 11] of

b. The mean value theorem guarantees the existence of
such that
. This happens for
