Question

Which of the curves in figure represents the relation between Celsius and Fahrenheit temperatures?

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

The correct option is A $1$

$\frac{C}{5}=\frac{F-32}{9}\Rightarrow C=\left(\frac{5}{9}\right)F-\frac{160}{9}$
Hence graph between ${}^{\circ }\text{C}$ and ${}^{\circ }\text{F}$ will be a straight line with positive slope and negative $y-$intercept.