Question 660938
{{{ 4.9t^2 = D }}}
(a)
Make {{{ t = 0 }}}
then {{{ D = 0 }}}
So the graph goes through (0,0)
Make {{{ t = 1 }}}
{{{ D = 4.9 }}}
Graph goes through (1,4.9)
Here's the graph:
{{{ graph( 400, 400, -2, 10, -10, 200, 4.9x^2) }}} 
given:
{{{ D = 155 }}}
{{{ 4.9t^2 = 155 }}}
{{{ t^2 = 155/4.9 }}}
{{{ t = sqrt( 155/4.9 ) }}} sec