graphA red line starts at left-parenthesis 3 comma 20 right-parenthesis. It passes through the points left-parenthesis 8 comma 25 right-parenthesis, near left-parenthesis 12 comma 30 right-parenthesis, and left-parenthesis 13 comma 30 right-parenthesis. A blue line starts near left-parenthesis 3 comma 8 right-parenthesis. It passes through the points left-parenthesis 9 comma 25 right-parenthesis, left-parenthesis 14 comma 40 right-parenthesis, and left-parenthesis 19 comma 55 right-parenthesis. The data points sit at the following points: left-parenthesis 6 comma 19 right-parenthesis, left-parenthesis 8 comma 26 right-parenthesis, left-parenthesis 10 comma 25 right-parenthesis, left-parenthesis 12 comma 30 right-parenthesis, left-parenthesis 14 comma 39 right-parenthesis, left-parenthesis 16 comma 49 right-parenthesis, left-parenthesis 18 comma 44 right-parenthesis.
According to the blue line, about how many weeks of practice are required to achieve a score of 50?
A. 15 weeks
B. 17 weeks
C. 19 weeks
D. 21 weeks
1 answer
B. 17 weeks