What is the most appropriate type of graph to use to compare the masses of eight planets? a.) a line graph b.) a circle graph c.) a proportion graph d.) a bar graph

Option D, A bar graph.

Explanation:

A bar graph will be more suitable for representing the masses of eight planets. Basically a bar graph is used to compare a set of objects/substances belonging to a certain category or group.  

Continous changes or trends are represented through a  line graph. A circle graph is also not useful here as it can best represent some values upto a maximum number of 5 or 6 categories/sectors. And regression relation between two variables is represented by a proportional graph  

Hence, option D is correct

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation: