Use Mathematical Models
-The Formula $\mathrm { C } = \frac { 5 } { 9 } ( \mathrm {~F} - 32 )$

Use Mathematical Models
-The formula $\mathrm { C } = \frac { 5 } { 9 } ( \mathrm {~F} - 32 )$ expresses the relationship between Fahrenheit temperature, $\mathrm { F }$ , and Celsius temperature, C. Use the formula to convert $68 ^ { \circ } \mathrm { F }$ to its equivalent temperature on the Celsius scale.

A) $20 ^ { \circ } \mathrm { C }$
B) $4 ^ { \circ } \mathrm { C }$
C) $56 ^ { \circ } \mathrm { C }$
D) $65 ^ { \circ } \mathrm { C }$