Question 454092
The given points are (0, 100.4) and (3, 134.1)
Use the point-slope formula
{{{ ( y - 110.4 ) / ( x - 0 ) = ( 134.1 - 110.4 ) / ( 3 - 0 ) }}}
{{{ ( y - 110.4 ) / x = 23.7 / 3 }}}
Multiply both sides by {{{ 3x }}}
{{{ 3*( y - 110.4 ) = 23.7x }}}
{{{ 3y - 331.2 = 23.7x }}}
{{{ 3y = 23.7x + 331.2 }}}
{{{ y = 7.9x + 110.4 }}} this is the equation
Sales in 2008:
{{{ y = 7.9*2 + 110.4 }}}
{{{ y = 15.8 + 110 4 }}}
{{{ y = 126.2 }}}
The sales in 2008 were 126.2 billion
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{{{ y = 7.9x + 110.4 }}}
{{{ 170 = 7.9x + 110.4 }}}
{{{ 7.9x = 59.6 }}}
{{{ x = 7.54 }}}
{{{2006 + 7.54 = 2013 }}}
sales will reach 170 billion in 2013