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Algebra / Linear functions Difficulty: Easy

A bus is traveling at a constant speed along a straight portion of road. The equation $d equals 30 t$ gives the distance $d$ , in feet from a road marker, that the bus will be $t$ seconds after passing the marker. How many feet from the marker will the bus be $2$ seconds after passing the marker?

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Explanation

Choice C is correct. It’s given that $t$ represents the number of seconds after the bus passes the marker. Substituting $2$ for $t$ in the given equation $d equals 30 t$ yields $d equals 30 left parenthesis 2 right parenthesis$ , or $d equals 60$ . Therefore, the bus will be $60$ feet from the marker $2$ seconds after passing it.

Choice A is incorrect. This is the distance, in feet, the bus will be from the marker $1$ second, not $2$ seconds, after passing it.

Choice B is incorrect and may result from conceptual or calculation errors.

Choice D is incorrect. This is the distance, in feet, the bus will be from the marker $3$ seconds, not $2$ seconds, after passing it.