To find the y-intercept of the equation \( P = 17.50x + 65 \), we need to determine the value of \( P \) when \( x = 0 \).
Substituting \( x = 0 \) into the equation:
\[ P = 17.50(0) + 65 \] \[ P = 0 + 65 \] \[ P = 65 \]
Thus, the y-intercept of the equation is 65.
Interpretation in the context of the problem:
The y-intercept of 65 represents Ryan's base pay for a day when he does not sell any computers (i.e., when \( x = 0 \)). This means that even if Ryan sells no computers, he will still earn $65 for the day.