document.write( "Question 511370: If the charge is $16 for t=0 minutes and c=$19.50 for 35 minutes, find the linear equation that expresses c in terms of t and use it to determine when t=75 minutes \n" ); document.write( "

Algebra.Com's Answer #342178 by lwsshak3(11628) $\"\"$ $\"About$

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If the charge is $16 for t=0 minutes and c=$19.50 for 35 minutes, find the linear equation that expresses c in terms of t and use it to determine when t=75 minutes
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\n" ); document.write( "c=mt+b
\n" ); document.write( "given two points to work with (16,0) and (19.50,35)
\n" ); document.write( "m=∆c/∆t=(19.5-16)/35-0)=3.5/35=1/10
\n" ); document.write( "c=t/10+b
\n" ); document.write( "find b using one of the given points (16,0)
\n" ); document.write( "16=0/10+b
\n" ); document.write( "b=16
\n" ); document.write( "Equation:
\n" ); document.write( "c=t/10+16
\n" ); document.write( "for t=75 min
\n" ); document.write( "c=75/10+16=$23.50 \n" ); document.write( "

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