Question 1089441
Find the equation of this straight line
I can set these conditions:
1992 = 0
1994 = 2
1996 = 4
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Let {{{ y }}} = billions of dollars spent
Let {{{ x }}} = number of years after 1992
Use the general point-slope formula
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{{{ ( y - 76 ) / ( x - 0 ) = ( 110 - 76 ) / ( 4 - 0 ) }}}
{{{ ( y - 76 ) / x = 34 / 4 }}}
{{{ 4*( y - 76 ) = 34x }}}
{{{ 2*( y - 76 ) = 17x }}}
{{{ 2y - 152 = 17x }}}
{{{ y = ( 17/2 )*x + 76 }}}
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1994 = 2
{{{ y = ( 17/2 )*2 + 76 }}}
{{{ y = 17 + 76 }}}
{{{ y = 93 }}}
93 billion was spent during 1994
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here's the plot:
{{{ graph( 400, 400, -1, 5, -15, 150, (17/2)*x + 76 ) }}}