(4,7) because 3•4 = 12 and 12+7 = 19
Answer:

Step-by-step explanation:

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Answer:
1 hour and 20 minutes
Step-by-step explanation:
45+25+10=80 minutes which equal 1 hour and 20 minutes
It means the speed (velocity) was constant - the object traveled the same distance per time period throughout the graph.