which graph best represents the relationship between the number of atoms and pressure?\npressure…

Explanation:

Step 1: Apply Ideal Gas Law

Assuming constant volume and temperature, ( P = \frac{nRT}{V} ), where ( n ) is moles of gas.

Step 2: Relate moles to atoms

Number of atoms is proportional to moles (( n \propto \text{atoms} ) for fixed particles per atom).

Step 3: Determine relationship

From ( P \propto n ) and ( n \propto \text{atoms} ), pressure is directly proportional to number of atoms, forming a linear positive slope.

Answer:

The graph with a straight line showing a positive linear relationship (first graph).