Question 327917
You have two points (6,48) and (7,50.5).
Use the formula for slope,
{{{m=(y2-y1)/(x2-x1)=(50.5-48)/(7-6)=2.5/1=2.5}}}
Then use the point-slope form of a line,{{{y-yp=m(x-xp)}}},with either point.
{{{y-48=2.5(t-6)}}}
{{{y-48=2.5t-15}}}
{{{highlight(y=2.5t+33)}}}
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What is the height(y) when the age(t) is 10?
{{{H=2.5(10)+33}}}
{{{H=25+33=58}}} inches