Answer:
For every increase in mass, the gravitational force increases.
If the total mass increases by a factor of 4, the gravitational force increases by a a factor of 4.
Explanation:
Compare the first row and the second row. Notice that m₂ stays the same, and m₁ triples. Notice that Fg also triples. So Fg is directly proportional to m₁.
Now compare the second row to the fourth row. Notice that m₁ stays the same and m₂ quadruples. Notice that Fg also quadruples. So Fg is also directly proportional to m₂.
Therefore:
Fg = k m₁ m₂
where k is a constant (in this case, k = 1).
So if the product m₁ m₂ increases by a factor of 4, then Fg will also increase by a factor of 4.
