The rate of change from the hour 4 to hour 7 is equal to the slope of 0 miles per hour.
How to determine the rate of change of a segment of a graph
The rate of change of a segment of a graph is represented by its slope, the slope that can be determined by the secant line formula:
m = Δd / Δt
Where:
- Δd - Change in distance, in miles.
- Δt - Time, in hours.
First, determine the coordinates of the initial and final points of the graph:
(t₁, d₁) = (4, 120), (t₂, d₂) = (7, 120)
Second, find the rate of change of the segment:
m = (120 - 120) / (7 - 4)
m = 0 mi / h
To learn more on rates of change: https://brainly.com/question/861183
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