Question 356211
y = temperature at any given time t.
temperature increase 2 deg /hour
in t hours it will increase by 2t deg.
now it is -6
so the equation for temperature at any given time later will be
y = -6 +2t
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{{{graph(300,300,-2,7,-8,5,(-6+2x))}}}
you will observe after 3 hours temperature = 0 , y=0
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Similarly
y = 12-3t
{{{graph(300,300,-2,7,-2,13,(12-3x))}}}
 after 4 hours y=0 Or temperature = 0
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m.ananth@hotmail.ca