Step-by-step explanation:
distance must be given
average speed is distance and time
(1) The train travels 4 miles per gallon.
(2) The slope of the graph is 
Explanation:
(1) The miles that train travels per gallon is given by

Dividing, we have,

Thus, the train travels 4 miles per gallon.
(2) To determine the slope, let us consider two points from the graph.
The coordinates are
and 
Thus, substituting the coordinates in the slope formula, we get,

Simplifying, we have,

Thus, the slope of the graph is 
Answer:
i think d) -25 is answer
Step-by-step explanation:
good luck
<span>each question is worth 4 points because if he missed 5 questions and 5*4 is 20 and 20 minus 100 is 80
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