Answer:
Juan bought 3 bags of popcorn and 8 bags of pretzel
Explanation:
Given



Required
Solve graphically
First, we need to represent the cost as an equation.
If popcorn costs 7.50 per bag and pretzel costs 3.75 per bag
The cost is then represented as:

Next, we represent the quantity as an equation.
Bags of pretzel is 5 more than bags of popcorn
The quantity is then represented as:

At this stage, we have:


See attachment for graph
is represented by the
while the
represents

At the point of intersection of both lines, we have:

This implies that;
Juan bought 3 bags of popcorn and 8 bags of pretzel