The graph between two temperature scales `A` and `B` is shown in Fig. Between upper fixed point and lower fixed point there are `150` equal divisions on scales `A` and `100` on scale `B`. The relation between the temperature in two scales is given by_

Explanation

When `t_(B) = 0, t_(A) = 30^(@) :. (t_(A) - 30)/(150) = (t_(B) - 0)/(100)`