How are equations created from context and used to solve real world problems?

Use the graph of the sine function y=2sinθ shown below

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?