Question

what is the speed of the bus?
find the rate of change.
buss rate of change:
rate of change = $\frac{change in y-values}{change in x-values}$

distance (mi)
time (h)

Explanation:

Step1: Identify bus's coordinate points

From the graph, the bus line goes through (0, 0) and (6, 180), where $x$ = time (h), $y$ = distance (mi).

Step2: Calculate rate of change

Use the rate of change formula: $\text{rate of change} = \frac{\text{change in } y\text{-values}}{\text{change in } x\text{-values}}$
$\text{rate of change} = \frac{180 - 0}{6 - 0} = \frac{180}{6}$

Step3: Simplify the expression

$\frac{180}{6} = 30$

Answer:

30 miles per hour