An aptitude test known as the gesell adaptive score test is given to children to measure their level of cognitive development. it is of interest to know whether or not a relationship exists between this test score and the age (in months) at which a child speaks his/her first word. to examine this, the following data were collected for 21 children: (a) treating the gesell score as the response variable (y) and the age at first word as the explanatory variable (x), make a scatterplot of these data.
does there appear to be a linear relationship among these variables?

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