Question 1011475
{{{x}}}|{{{1}}}|{{{1.5}}}|{{{2}}}|{{{2.5}}}|{{{3}}}|{{{3.5}}}|{{{4}}}|{{{4.5}}}
{{{y}}}|{{{-3}}}|{{{_}}} |{{{2}}}|{{{3 }}} |{{{3}}}| {{{_}}} |{{{_}}} |{{{_}}}  

you are missing {{{y}}} for {{{x=1.5}}},{{{x=3.5}}},{{{x=4}}}, and {{{x=4.5}}}

{{{y=11x-2x^2-12}}} for {{{x=1.5}}}

{{{y=11(1.5)-2(1.5)^2-12}}}
{{{y=16.5-4.5-12}}}
{{{y=16.5-16.5}}}
{{{y=0}}}

{{{y=11x-2x^2-12}}} for {{{x=3.5}}}

{{{y=11(3.5)-2(3.5)^2-12}}}
{{{y=38.5-24.5-12}}}
{{{y=38.5-36.5}}}
{{{y=2}}}

{{{y=11x-2x^2-12}}} for {{{x=4}}}

{{{y=11(4)-2(4)^2-12}}}
{{{y=44-32-12}}}
{{{y=44-44}}}
{{{y=0}}}


{{{y=11x-2x^2-12}}} for {{{x=4.5}}}

{{{y=11(4.5)-2(4.5)^2-12}}}
{{{y=49.5-40.5-12}}}
{{{y=49.5-52.5}}}
{{{y=-3}}}


so, your table is:


{{{x}}}|{{{1}}}|{{{1.5}}}|{{{2}}}|{{{2.5}}}|{{{3}}}|{{{3.5}}}|{{{4}}}|{{{4.5}}}
{{{y}}}|{{{-3}}}|{{{0}}} |{{{2}}}|{{{3 }}} |{{{3}}}| {{{2}}} |{{{0}}}|{{{-3}}}  


plot these points and draw a line through:


{{{drawing( 600, 600, -10, 10, -10, 10,
circle(1,-3,.12),circle(1.5,0,.12),circle(2,2,.12),circle(2.5,3,.12),
circle(3,3,.12),circle(3.5,2,.12),circle(4,0,.12),circle(4.5,-3,.12),
 graph( 600, 600, -10, 10, -10, 10, 11x-2x^2-12)) }}}