document.write( "Question 1089441: Americans spent 76 billion dollars on a certain commodity in 1992 and 110 billion dollars in 1996. assuming that this trend continues, estimate the amount spent on this commodity during 1994. \n" ); document.write( "

Algebra.Com's Answer #703790 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
Find the equation of this straight line
\n" ); document.write( "I can set these conditions:
\n" ); document.write( "1992 = 0
\n" ); document.write( "1994 = 2
\n" ); document.write( "1996 = 4
\n" ); document.write( "--------------
\n" ); document.write( "Let $\"+y+\"$ = billions of dollars spent
\n" ); document.write( "Let $\"+x+\"$ = number of years after 1992
\n" ); document.write( "Use the general point-slope formula
\n" ); document.write( "--------------------------------------
\n" ); document.write( " $\"+%28+y+-+76+%29+%2F+%28+x+-+0+%29+=+%28+110+-+76+%29+%2F+%28+4+-+0+%29+\"$
\n" ); document.write( " $\"+%28+y+-+76+%29+%2F+x+=+34+%2F+4+\"$
\n" ); document.write( " $\"+4%2A%28+y+-+76+%29+=+34x+\"$
\n" ); document.write( " $\"+2%2A%28+y+-+76+%29+=+17x+\"$
\n" ); document.write( " $\"+2y+-+152+=+17x+\"$
\n" ); document.write( " $\"+y+=+%28+17%2F2+%29%2Ax+%2B+76+\"$
\n" ); document.write( "--------------------------
\n" ); document.write( "1994 = 2
\n" ); document.write( " $\"+y+=+%28+17%2F2+%29%2A2+%2B+76+\"$
\n" ); document.write( " $\"+y+=+17+%2B+76+\"$
\n" ); document.write( " $\"+y+=+93+\"$
\n" ); document.write( "93 billion was spent during 1994
\n" ); document.write( "------------------------------
\n" ); document.write( "here's the plot:
\n" ); document.write( " $\"+graph%28+400%2C+400%2C+-1%2C+5%2C+-15%2C+150%2C+%2817%2F2%29%2Ax+%2B+76+%29+\"$
\n" ); document.write( " \n" ); document.write( "

\n" );