Question 1014249
The formula for area is:
{{{ A = pi*r^2 }}}
The radius of the rug is given as:
{{{ r + 1 + 1 = r + 2 }}}
Now I can say:
{{{ A = pi*( r + 2 )^2 }}}
{{{ A = pi*( r^2 + 4r + 4 ) }}}
{{{ A = pi*r^2 + 4*pi*r + 4*pi }}}
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{{{ A }}} is plotted on the vertical axis
and {{{ r }}} is plotted on the horizontal axis