A Study on the Oxygen Consumption Rate (OCR) of Sea $15 ^ { \circ } \mathrm { C }$

Multiple Choice

A study on the oxygen consumption rate (OCR) of sea cucumbers involved random samples of size 3 at each of the temperatures 10, 11, 12, 13, 14, and $15 ^ { \circ } \mathrm { C }$ . A regression model was fit in order to study the
Relationship between OCR and temperature. The slope of the regression line was found to be positive.
If one of the analysts converted the temperatures to Fahrenheit $\left( { } ^ { \circ } \mathrm { F } = 32 + ( 9 / 5 ) ^ { 0 } \mathrm { C } \right)$ the slope of the
Regression line would be

A) increased by a factor $9 / 5$
B) increased by a factor $5 / 9$
C) unaltered
D) decreased by a factor $9 / 5$