Analyse the following graph. The data shows the results of three groups of 15 athletes who were instructed to complete a basketball shooting exercise (success rate from 20 free throw shots) having received one of three methods of instruction, auditory (shooting technique being verbally described by a coach) , visual (shooting technique being verbally described by a coach) or kinaesthetic (no coaching, just asked to perform the shooting exercise) . Motivation acted as the covariate of interest. How would you describe the regression slopes? 
A) Positive and homogeneous
B) Positive and heterogeneous
C) Negative and homogeneous
D) Negative and heterogeneous
Correct Answer:
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