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7 October, 17:00

Two hikers are walking along the Appalachian Trail. The first hiker is 2 miles ahead of the second hiker. Both hikers are traveling in the same direction at the same speed, 1 mile per hour. Let x represent the distance traveled by the first hiker after a certain time period.

Several students wrote equations for this situation. Which student is correct?

A.

Alex said, "The equation y = 2x + 1 represents the total distance traveled by both hikers."

B.

Brenda said, "The equation y = 3x represents the total distance traveled by both hikers."

C.

Chris said, "The equation y = x - 2 represents the distance traveled by the second hiker."

D.

Drake said, "The equation y = x + 2 represents the distance traveled by the second hiker."

+1
Answers (2)
  1. 7 October, 17:35
    0
    Chris is correct. (Choice letter C)

    Step-by-step explanation:

    We can eliminate choices A and B from the get-go because the problem stated that both hikers are traveling at 1mi/hr. This means that the slope of the equation would equate to 1, so just x.

    That leaves us with C and D. The two equations both have a slope of 1, but C has a y-intercept of - 2 and D has a y-intercept of 2, which represents the starting location of the second hiker. The first hiker is the one who is ahead by 2 miles, so it can't be D. This leaves us with choice C. Chris is correct.
  2. 7 October, 18:25
    0
    C. Chris said, "The equation y = x - 2 represents the distance traveled by the second hiker."
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