We have 4 entries, but we just need 2 to plot the relation lets pick the first two, we would be using the equation of a line in the two-point form
[tex]\begin{gathered} \frac{c_{}-c_1}{d_{}-d_1}=\frac{c_2-c_1}{d_2-d_1} \\ \end{gathered}[/tex]
We, put in the points, ( 673,22) and (3277,101), we get
[tex]\frac{c-22}{d-673}=\frac{101-22}{3277-673}=\frac{79}{2604}=0.03[/tex][tex]\begin{gathered} \frac{c-22}{d-673}=0.03 \\ c-22=0.03(d-673) \\ c-22=\text{ 0.03(d-673)} \\ c-22=0.03d-20.19 \\ c=0.03d+1.81 \end{gathered}[/tex]
Lets try the third point with this relation d=5180
c=0.03(5180) +1.81 = 157.21. This is a close estimate to the actual value $150
