he graph shows the number of meters Jacob runs as a function of time in minutes.



If Sam runs 15 meters less each minute than Jacob does, which equation represents the total meters, m, that Sam runs in t minutes?
m = 200t
m = 185t
m = 215t
m = 15t

1 answer

To determine the equation that represents the total meters \( m \) that Sam runs in \( t \) minutes, we first need to understand how much Jacob runs.

Let's analyze the information given about Sam:

  1. Let \( J(t) \) be the distance Jacob runs in \( t \) minutes. The graph should provide the equation for Jacob's running, which is typically in the form \( m = rt \), where \( r \) is the rate (in meters per minute).

  2. If Sam runs 15 meters less each minute than Jacob, we can express Sam's running rate as: \[ S(t) = J(t) - 15 \] where \( J(t) \) is Jacob's distance formula.

  3. Based on the options you provided, it seems that we need to consider potential rates for Jacob and then determine Sam's.

Let’s consider the possible equations provided:

  • \( m = 200t \)
  • \( m = 185t \)
  • \( m = 215t \)
  • \( m = 15t \)

If we assume Jacob runs at a certain rate and then subtract 15 from it for Sam's running rate:

  • If \( m = 200t \), then Sam's rate would be \( 200 - 15 = 185 \), giving \( m = 185t \).

  • If \( m = 185t \), then Sam's rate would be \( 185 - 15 = 170 \) (not in the given options).

  • If \( m = 215t \), then Sam's rate would be \( 215 - 15 = 200 \) (not in the given options).

  • If \( m = 15t \), then Sam's rate would be \( 15 - 15 = 0 \) (not plausible).

Based on the logical deductions, if Jacob runs \( 200t \), then Sam runs \( 185t \).

Thus, the equation that represents the total meters \( m \) that Sam runs in \( t \) minutes is:

\[ m = 185t \]