Two-Point Linear Interpolation
The equation of the line through (x1, y1) and (x2, y2) on a plot of y versus x is y = y1 + ((y2 - y1)/(x2 - x1))(x - x1).
Example: Values of a variable are measured at several times (t). Show that if two-point linear interpolation is used:
(a) f(t = 1.3) = 1.9
(b) t(j = 5) = 2.25