What is the slope between the points (2,5) and (6,13)

Ineed in figuring out this problem.

Draw a scaled copy of the circle using a scale factor of 2

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)