document.write( "Question 1009947: the number of volunteers of a worldwide organization has increased from 5.7 million in 2002 to 11.5 million in 2011. Find an equation for the line containing the given points. Let x represent the number of years after 2000 and y the number of volunteers, in millions. \n" ); document.write( "

Algebra.Com's Answer #625434 by josmiceli(19441) $\"\"$ $\"About$

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You are given 2 points:
\n" ); document.write( "( 2, 5.7 ) meaning 2002, 5.7 million
\n" ); document.write( "( 11, 11.5 ) meaning 2011, 11.5 million
\n" ); document.write( "---------------------------------
\n" ); document.write( "Use the general point-slope formula
\n" ); document.write( " $\"+%28+y+-+5.7+%29+%2F+%28+x+-+2+%29+=+%28+11.5+-+5.7+%29+%2F+%28+11+-+2+%29+\"$
\n" ); document.write( " $\"+%28+y+-+5.7+%29+%2F+%28+x+-+2+%29+=+5.8+%2F+9+\"$
\n" ); document.write( "Multiply both sides by $\"+9%2A%28+x-2+%29+\"$
\n" ); document.write( " $\"+9%2A%28+y+-+5.7+%29+=+5.8%2A%28+x-2+%29+\"$
\n" ); document.write( " $\"+9y+-+51.3+=+5.8x+-+11.6+\"$
\n" ); document.write( " $\"+9y+=+5.8x+%2B+39.7+\"$
\n" ); document.write( " $\"+y+=+.644x+%2B+4.411+\"$
\n" ); document.write( "-------------------
\n" ); document.write( "check:
\n" ); document.write( "( 2, 5.7 )
\n" ); document.write( " $\"+5.7+=+.644%2A2+%2B+4.411+\"$
\n" ); document.write( " $\"+5.7+=+1.288+%2B+4.411+\"$
\n" ); document.write( " $\"+5.7+=+5.699+\"$
\n" ); document.write( "close enough
\n" ); document.write( "-----------------
\n" ); document.write( "( 11,11.5 )
\n" ); document.write( " $\"+11.5+=+.644%2A11+%2B+4.411+\"$
\n" ); document.write( " $\"+11.5+=+7.084+%2B+4.411+\"$
\n" ); document.write( " $\"+11.5+=+11.495+\"$
\n" ); document.write( "close enough \n" ); document.write( "

\n" );