Question 53359
Substitute x=2,7,9,11 into the problem and solve for p like so:
{{{P=-x/2+75}}}
When x=2
{{{p=-2/2+75}}}
{{{p=-1+75}}}
p=$74
When x=7
{{{p=-7/2+75}}}
{{{p=-7/2+150/2}}}
{{{p=(-7+150)/2}}}
{{{p=143/2}}}
p=$71.50
When x=9
{{{p=-9/2+75}}}
{{{p=-9/2+150/2}}}
{{{p=(-9+150)/2}}}
{{{p=141/2}}}
p=$70.50
When x=11
{{{p=-11/2+75}}}
{{{p=-11/2+150/2}}}
{{{p=(-11+150)/2}}}
{{{p=139/2}}}
p=$69.50