To find the mean, or average, high temperature for the week:
1. Record the high temperatures for each day:
- Sunday: 46°F
- Monday: 52°F
- Tuesday: 51°F
- Wednesday: 54°F
- Thursday: 49°F
- Friday: 51°F
- Saturday: 61°F
2. Add all the high temperatures together:
[tex]\[
46 + 52 + 51 + 54 + 49 + 51 + 61 = 364
\][/tex]
3. Count the number of days:
There are 7 days in a week.
4. Divide the total sum of the temperatures by the number of days:
[tex]\[
\frac{364}{7} = 52
\][/tex]
Therefore, the mean, or average, high temperature for the week is [tex]\( \boxed{52.0} \)[/tex] degrees.