To determine how many shots Ruthie took on goal, we can set up a relationship based on the information given.
According to the scenario, for every 7 shots (S) Ruthie takes, she scores 2 times (Sc). This can be expressed as:
\[ \frac{S}{7} = \frac{Sc}{2} \]
If Ruthie scores 8 times (Sc = 8), we can substitute that into the equation:
\[ \frac{S}{7} = \frac{8}{2} \]
This simplifies to:
\[ \frac{S}{7} = 4 \]
Now, we can solve for S:
\[ S = 4 \times 7 = 28 \]
So, the number of shots on goal Ruthie took is 28 shots.
Thus, the correct response is:
28 shots