The graph of a function is shown: in which part of the graph is the function increasing? ab bc cd de

Find the derivative of the graph and then find at which point slope is zero. Then plug in the x value before that point where the slope is zero and after that point. If it is positive than the graph is increasing for that interval and if it is negative than the function is decreasing for that interval.
 

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle