Question 1196542
 given points: ({{{4}}},{{{12}}}), ({{{6}}},{{{16}}}), ({{{8}}},{{{25}}}), ({{{9}}},{{{30}}}), ({{{19}}},{{{39}}})


since given points do not lie on same line, we will find equation off best fit line

{{{mean(x)=9.2}}}
{{{mean(y)=24.4}}}

{{{slope=(sum((xi-x))(yi-y))/(xi-x)^2=232.6/134.8=1.73}}}

{{{intercept=y-mx=24.4-1.73(9.2)=8.53}}}
 

equation off best fit line is    {{{y=1.73x+8.53}}}


 the  slope is {{{1.73}}}

the intercept is {{{8.53}}}



check for {{{x=10}}}

{{{y=1.73*10+8.53}}}

{{{y = 25.83}}}


answer:


c.
When {{{x}}} is {{{10}}}, then the estimated sales will be {{{25.83}}}