document.write( "Question 824744: Kristi's ride to school is 3 minutes more than 1/2 Brianne's travel time. what graph shows the possible times of Kristi's and Brianne's rides to school? \n" ); document.write( "

Algebra.Com's Answer #496755 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
They travel the same distance, so
\n" ); document.write( "let $\"+d+\"$ = the distance for both
\n" ); document.write( "Let $\"+t+\"$ = Brianne's time in minutes
\n" ); document.write( "Let

\n" ); document.write( "Brianne's equation:
\n" ); document.write( " $\"+d+=+r%5B2%5D%2At+\"$
\n" ); document.write( "---------------
\n" ); document.write( "By substitution:
\n" ); document.write( " $\"+r%5B1%5D%2A%28+t%2F2+%2B+3+%29+=+r%5B2%5D%2At+\"$
\n" ); document.write( " $\"+r%5B1%5D%2Fr%5B2%5D+=+t+%2F+%28%28+t%2F2+%2B+3+%29%29+\"$
\n" ); document.write( "--------------------------
\n" ); document.write( " $\"+r%5B1%5D%2Fr%5B2%5D+\"$ compare the slopes of their equations
\n" ); document.write( "Suppose $\"+t+=+18+\"$ min
\n" ); document.write( " $\"+r%5B1%5D%2Fr%5B2%5D+=+18+%2F+%28+18%2F2+%2B+3+%29+\"$
\n" ); document.write( " $\"+r%5B1%5D%2Fr%5B2%5D+=+18%2F12+\"$
\n" ); document.write( "This says if Kristi's rate of travel is 18,
\n" ); document.write( "then Brianne's must be 12
\n" ); document.write( "-----------------------
\n" ); document.write( "Brianne's rate will always be less than Kristi's
\n" ); document.write( "unless Kristi's rate is 2, then Brianne's rate is 4
\n" ); document.write( "or Kristi's rate is 3, then Brianne's rate is 4.5
\n" ); document.write( "or Kristi's rate is 4, then Brianne's rate is 5
\n" ); document.write( "or Kristi's rate is 5, the Brianne's rate is 5.5
\n" ); document.write( "If Kristi's rate is 6, then Brianne's rate is 6 also
\n" ); document.write( "From that rate on. Brianne's will always be less\r
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