Final answer:
The relationship between Ruby's age and weight can be represented by a line graph. Two points, (2, 5) and (4, 9), can be plotted to show this relationship.
Step-by-step explanation:
The relationship between Ruby's age and weight can be represented by a line graph. Let's take two points from the given information and plot them on the graph.
When Ruby is 2 months old, she weighs 5 pounds. So, we can plot the point (2, 5) on the graph.
When Ruby is 4 months old, she weighs 9 pounds. So, we can plot the point (4, 9) on the graph.
Now, we can draw a line passing through these two points to represent the relationship between Ruby's age and weight.