Solve Assume the Exercise Describes a Linear Relationship $687.7$ B) $699.2$ C) $709.0$

Multiple Choice

Solve. Assume the exercise describes a linear relationship.
-Persons taking a 30-hour review course to prepare for a standardized exam average a score of 620 on that exam. Persons taking a 70-hour review course average a score of 770 . Find a linear equation which fits this data, and which relates score to review time. Use this equation to predict an average score for persons taking a 50-hour review course. Round your answer to the nearest tenth.

A) $687.7$
B) $699.2$
C) $709.0$
D) $695.0$