Let the x-axis represent the temperature in Celcsius and y-axis represent the temperature in Fahrenheint.
Look at picture below.
The y-intercept is 32 because for 0 celius we have 32 fahrenheint.
The other point is (100,212).
Find the slope,
The y-intercept is 32 as explained before.Code:212-32 9 -------- = -- 100-0 5
Thus, the equation of the line is, i.e. conversion formula from celius to fahrenheit is.