Question 1098638
Points  (40,10), (48,20), and (x,30).


Assuming linear relationship,
{{{m=(20-10)/(48-40)=10/8=5/4}}}
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{{{highlight_green(y-10=(5/4)(x-40))}}}

{{{(4/5)(y-10)=x-40}}}

{{{(4/5)(y-10)+40=x}}}

{{{x=(4/5)(30-10)+40}}}

{{{x=(4/5)*20+40}}}

{{{x=16+40}}}

{{{highlight(x=56)}}}---------temperature when 30 chirps per min.