To find the slope of the arithmetic sequence, we look at the difference in the number of muffins baked each day.
- From day one to day two: \( 11 - 5 = 6 \)
- From day two to day three: \( 17 - 11 = 6 \)
The difference or slope between each pair of days is consistently \( 6 \).
Thus, the slope for this arithmetic sequence is 6.