Question 1097603
I assume it's a straight line relation
Plot {{{ v }}} on vertical axis
Plot {{{ t }}} on horizontal axis
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The slope is {{{ ( 3000 - 21000 ) / ( 8 - 0 ) }}}
slope = {{{ -18000/8 }}}
slope = {{{ -2250 }}}
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Use the general point-slope formula
{{{ ( v - 3000 ) / ( t - 8 ) = -2250 }}}
{{{ v - 3000 = -2250*( t - 8 ) }}}
{{{ v - 3000 = -2250t + 18000 }}}
{{{ v = -2250t + 21000 }}}
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check:
When {{{ t=0 }}}
{{{ v = 21000 }}}
OK
When {{{ t=8 }}}
{{{ v = -2250*8 + 21000 }}}
{{{ v = -18000 + 21000 }}}
{{{ v = 3000 }}}
OK