Blanca runs 8 laps around the track each day to train for an endurance race. She times each lap to practice her pacing for the race. The table shows the lap times, in seconds, for three days of practice.

Endurance Race Training
\begin{tabular}{|c|c|c|c|c|c|c|c|c|}
\hline
\begin{tabular}{c}
Day 1 Lap Times \\ (seconds)
\end{tabular} & 83 & 92 & 91 & 89 & 94 & 93 & 88 & 84 \\
\hline
\begin{tabular}{c}
Day 2 Lap Times \\ (seconds)
\end{tabular} & 87 & 90 & 92 & 91 & 92 & 95 & 90 & 85 \\
\hline
\begin{tabular}{c}
Day 3 Lap Times \\ (seconds)
\end{tabular} & 85 & 86 & 91 & 93 & 91 & 89 & 88 & 84 \\
\hline
\end{tabular}

Which histogram represents Blanca's lap times for the three days of practice?



Answer :

Let's analyze Blanca's lap times over the three days and represent this data in a histogram.

First, we need to compile all lap times into a single list:
- Day 1: 83, 92, 91, 89, 94, 93, 88, 84
- Day 2: 87, 90, 92, 91, 92, 95, 90, 85
- Day 3: 85, 86, 91, 93, 91, 89, 88, 84

Combining these lap times from all three days, we get:
[tex]\[ 83, 92, 91, 89, 94, 93, 88, 84, 87, 90, 92, 91, 92, 95, 90, 85, 85, 86, 91, 93, 91, 89, 88, 84 \][/tex]

Next, we need to count the frequency of each lap time to prepare the data for the histogram:
- 83 seconds: 1 time
- 84 seconds: 2 times
- 85 seconds: 2 times
- 86 seconds: 1 time
- 87 seconds: 1 time
- 88 seconds: 2 times
- 89 seconds: 2 times
- 90 seconds: 2 times
- 91 seconds: 4 times
- 92 seconds: 3 times
- 93 seconds: 2 times
- 94 seconds: 1 time
- 95 seconds: 1 time

Based on the frequency counts, we can create a histogram where the x-axis represents the lap times and the y-axis represents the frequency of each lap time. Here's how it would be structured:

```
Lap Time | Frequency
---------------------
83 | 1
84 | 2
85 | 2
86 | 1
87 | 1
88 | 2
89 | 2
90 | 2
91 | 4
92 | 3
93 | 2
94 | 1
95 | 1
```

Graphical Representation of Histogram:
```
Lap Time Frequency
83
84

85

86

87
88

89

90

91

92

93
94
95

```

The histogram that represents Blanca's lap times over the three days would show the counts as described above. This histogram would help visualize the distribution of her lap times and the frequency with which each time occurred.