The answer is: {C]: "constant speed; 35 mi/h" .
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Explanation:
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Examine the graph provided; and examine the answer choices given.
When x = 1 ; (and the x-axis represent time in "h" (hours) ) ;
y = 35 (miles).
Even if you can't tell that it is EXACTLY 35 mi; it is closer to "35 mi" (after 1 hour); i.e "35 mi / h" than the other answer choices provided:
(i.e. "17.5 mi/ hr" ; and "70 mi./hr").
Furthermore, since the line is straight; we can determine that the speed is "constant" .
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