Question

2 Estimate the value for y when x = 3.5.Analyzing lines of fit

Answer 1

The line passes through (0,1) and (2,3).

Using the two point form the equation of line can be determined as,

$\begin{gathered} \frac{y-1}{x-0}=\frac{3-1}{2-0} \\ y=x+1 \end{gathered}$

The value of y when x=3.5 can be determined as,

$\begin{gathered} y=3.5+1 \\ y=4.5 \end{gathered}$

Thus, the requried value of y is 4.5.