It has a right angle (90 degrees) and 2 sides are equal which makes it isosceles.
So there's only one choice left.
Answer by JKismyhusbandbae: A bar graph because they are used a lot to compare the sizes of categories and it would show the countries different populations telephones per every 1000 people.
It may be because the range isn't actually considered an average, it's shown using a box and whiskers diagram, Mode is the most common number. Mean is all the numbers added up and divided by the amount of values there are in the adding up process. so overall the range is less useful to show variability as it only shows the lowest and highest number in the data, and not the different individual numbers variety amongst the results
5t = 25+2r
t = (25+2r)/5 or
t = 5 + (2/5)r
