Is the following graph a linear function, non linear function, and or a relation

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

The data set represents the ages of players in a chess club. 27, 34, 38, 16, 22, 45, 54, 60. what is the mean absolute deviation of the data set?

Find the slope of the line that passes through the points (-3, -1) and (0, 3). 3/4 0 4/3