Math Problem Statement

Carson practices each day to prepare for an upcoming race. He starts the day by running 2 miles and then walking at a rate of 4 miles per hour.

Which representations show the relationship between the total number of miles he covers in a day, y , and the number of hours he walks, x ?

Select THREE correct answers. A.y=2x+4

B. Number of Hours Walked Total Number of Miles 1 6 112 8 2 10

C. D.​​​​​​​y=4x+2

E. Number of Hours Walked Total Number of Miles 1 6 112 7 2 8

F.

Solution

Let's analyze the problem carefully to determine which of the given representations are correct.

Carson starts by running 2 miles each day, then walks at a rate of 4 miles per hour. We want to find the total number of miles yy he covers in a day, based on the number of hours xx he spends walking.

The equation for this situation can be written as: y=2+4xy = 2 + 4x where:

  • 22 represents the miles he runs at the beginning of the day, and
  • 4x4x represents the miles he covers walking at a rate of 4 miles per hour for xx hours.

Now, let's evaluate the options:

  1. Option A: y=2x+4y = 2x + 4
    This equation is incorrect because it suggests that the rate of walking is 2 miles per hour, and the constant distance covered is 4 miles. This does not match the situation described.

  2. Option B: Number of Hours Walked - Total Number of Miles Table (1, 6; 2, 10)
    If x=1x = 1, then y=2+4(1)=6y = 2 + 4(1) = 6.
    If x=2x = 2, then y=2+4(2)=10y = 2 + 4(2) = 10.
    This matches the table, so this is a correct representation.

  3. Option C: (No clear content, but if it matches y=2+4xy = 2 + 4x, it could be correct.)
    We need more information to assess Option C.

  4. Option D: y=4x+2y = 4x + 2
    This equation correctly represents the situation: 4 miles per hour walking rate multiplied by the number of hours xx, plus 2 miles that he starts with. This is correct.

  5. Option E: Number of Hours Walked - Total Number of Miles Table (1, 6; 2, 8)
    If x=1x = 1, then y=6y = 6, which is correct. But if x=2x = 2, then y=10y = 10, not 8. Therefore, this is incorrect.

  6. Option F: (No content provided here, so cannot be evaluated.)

Correct Answers

Based on the analysis:

  • B (Correct table)
  • D (Correct equation)
  • If more information aligns with y=4x+2y = 4x + 2, possibly C or F could be correct.

Would you like further details or have any questions?


Related Questions:

  1. What would the equation be if Carson runs 3 miles instead of 2?
  2. How would the graph of y=4x+2y = 4x + 2 look like on a coordinate plane?
  3. How can we determine if a table correctly represents a linear equation?
  4. What happens to the total distance yy if Carson increases his walking speed?
  5. How would the equation change if Carson also bikes at a different rate?

Tip:

Always substitute values back into an equation to verify if a given representation (table or equation) matches the described situation.

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Math Problem Analysis

Mathematical Concepts

Linear Equations
Algebra
Word Problems

Formulas

y = 2 + 4x

Theorems

Slope-Intercept Form

Suitable Grade Level

Grades 6-8