What is y=x+2. I need help fast please help

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

100 points, hi, i’m not sure how to get the equation from the graph and table.

Evaluate the expression for the given value of the variable 7a - 4a for a =8