The answer is in the attachment below:
Answer:
Unit conversion between Rankine and Kelvin is linear.
Unit conversion between degree Celsius and degree Fahrenheit is linear.
Explanation:
Relation between rankine and Kelvin is

So, the plot between Rankine and Kelvin is a straight line with zero intercept and has a slope having value
.
Relation between degrees Celsius and degrees Fahrenheit is given by

So, the plot between degrees Celsius and degrees Fahrenheit is a straight line with slope
and negative intercept of
.
The hills and valleys decrease the height and speed of the ride. This means that the graph has a negative correlation.
By the way, I think you may have plotted your points incorrectly. The directions said to connect them all with a smooth line or curve.
Also, this is not high school chemistry. This is more likely to be elementary school science. Just make sure that you put your questions in the correct categories next time! :)