document.write( "Question 536858: For the straight line defined by the points (1, 53) and (3, 87), determine the slope and y-intercept.do not round off the answer. \n" ); document.write( "

Algebra.Com's Answer #352604 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Slope = ( change in y ) / ( change in x )
\n" ); document.write( "( 1, 53 ) and ( 3, 87 )
\n" ); document.write( "Slope = $\"+%28+87+-+53+%29+%2F+%28+3+-+1+%29+\"$
\n" ); document.write( "Slope = $\"+34+%2F+2+\"$
\n" ); document.write( "Slope = $\"+17+\"$
\n" ); document.write( "If the straight line is in this form:
\n" ); document.write( " $\"+y+=+m%2Ax+%2B+b+\"$ , $\"m\"$ is the slope,
\n" ); document.write( "and $\"b\"$ is the y-intercept
\n" ); document.write( "So far I have
\n" ); document.write( " $\"+y+=+17x+%2B+b+\"$
\n" ); document.write( "Substitute one of th points for x and y
\n" ); document.write( " $\"+53+=+17%2A1+%2B+b+\"$
\n" ); document.write( " $\"+b+=+53+-+17+\"$
\n" ); document.write( " $\"+b+=+36+\"$
\n" ); document.write( "The y-intercept is $\"+y+=+36+\"$
\n" ); document.write( "Here's a plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-10%2C+10%2C+-10%2C+10%2C+17x+%2B+36%29+\"$ \n" ); document.write( "

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