document.write( "Question 640239: Ashley is driving to New York City. Suppose that the remaining distance to drive (in miles)is a linear function of her driving time (in minutes). When graphed, the function gives a line with a slope of -0.95.\r
\n" ); document.write( "\n" ); document.write( "Ashley has 58 miles remaining after 50 minutes of driving. How many miles were remaining after 38 minutes of driving? \n" ); document.write( "

Algebra.Com's Answer #403077 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Plot time = $\"t\"$ on the horizontal axis
\n" ); document.write( "Plot miles remaining = $\"r\"$ on the vertical axis
\n" ); document.write( "The equation has the form $\"+r+=+-.95t+%2B+r%5B0%5D+\"$
\n" ); document.write( "where $\"+r%5B0%5D+\"$ is the value of $\"+r+\"$ at $\"+t+=+0+\"$
\n" ); document.write( "given:
\n" ); document.write( " $\"+r+=+-.95t+%2B+r%5B0%5D+\"$
\n" ); document.write( " $\"+58+=+-.95%2A50+%2B+r%5B0%5D+\"$
\n" ); document.write( " $\"+58+=+-47.5+%2B+r%5B0%5D+\"$
\n" ); document.write( " $\"+r%5B0%5D+=+105.5+\"$
\n" ); document.write( "So, the equation is:
\n" ); document.write( " $\"+r+=+-.95t+%2B+105.5+\"$
\n" ); document.write( "When $\"+t+=+38+\"$
\n" ); document.write( " $\"+r+=+-.95%2A38+%2B+105.5+\"$
\n" ); document.write( " $\"+r+=+-36.1+%2B+105.5+\"$
\n" ); document.write( " $\"+r+=+69.4+\"$
\n" ); document.write( "69.4 miles remained after 38 minutes of driving
\n" ); document.write( "Here's the plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-10%2C+100%2C+-20%2C+200%2C+-.95x+%2B+105.5+%29+\"$ \n" ); document.write( "

\n" );