ANSWER
The correct answer is A
EXPLANATION
The slope between each interval tells us the speed.
The greatest slope is where the speed is greatest.
For the first hour to the second hour,
[tex]slope = \frac{34 - 12}{2 - 1} [/tex]
[tex]slope = \frac{22}{1} = 22[/tex]
For the second hour to the fourth hour,
[tex]slope = \frac{70 - 34}{4 - 2} [/tex]
[tex]slope = \frac{36}{2} = 18[/tex]
For the fourth hour to the sixth hour,
[tex]slope = \frac{104 - 70}{6 - 4} [/tex]
[tex]slope = \frac{34}{ 2} = 17[/tex]
For the sixth hour to the eighth hour,
[tex]slope = \frac{146 - 104}{8 - 6} [/tex]
[tex]slope = \frac{42}{2} = 21[/tex]
Therefore the bicyclist's speed was greatest during the first hour to the second hour.
