A graph shows the number of push-ups Angel did each day for a week. Analyze the graph to answer the following: a) On which day did Angel do the fewest push-ups? b) On which day did Angel do the most p

The lowest point on the graph occurs on Monday, where the number of push-ups is approximately 20.
The day with the least number of push-ups is $\boxed{\text{Monday}}$.

5.4.2

The highest point on the graph occurs on Thursday, where the number of push-ups is approximately 50.
The day with the highest number of push-ups is $\boxed{\text{Thursday}}$.

5.4.3

• Monday: 20 push-ups
• Tuesday: 30 push-ups
• Wednesday: 40 push-ups
• Thursday: 50 push-ups
• Friday: 25 push-ups
• Saturday: 25 push-ups
• Sunday: 30 push-ups

The total number of push-ups Angel did for the week is $\boxed{\text{220}}$.

5.4.4

A linear graph is represented by a single straight line. This graph consists of multiple connected line segments that change direction, indicating varying rates of change.
The graph is $\boxed{\text{non-linear}}$.