Question 360067
{{{drawing(300,300,-2,10,-10,40,grid(1),
circle(1,7.0,0.3),
circle(2,13.0,0.3),
circle(3,19.0,0.3),
circle(4,25.0,0.3),
circle(5,31.0,0.3),
graph(300,300,-2,10,-10,40,0))}}}
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The data exactly fit a straight line.
Use two points to calculate the slope.
{{{m=(31-7)/(5-1)=24/4=6}}}
Then use the point-slope form of a line, {{{y-y[p]=m(x-x[p])}}} with any point.
{{{y-7=6(x-1)}}}
{{{y-7=6x-6}}}
{{{highlight(y=6x+1)}}}
{{{drawing(300,300,-2,10,-10,40,grid(1),
circle(1,7.0,0.3),
circle(2,13.0,0.3),
circle(3,19.0,0.3),
circle(4,25.0,0.3),
circle(5,31.0,0.3),
graph(300,300,-2,10,-10,40,0,6x+1))}}}