Strep throat: Classically strep throat does not cause a cough. It's possible you have/ had a viral upper respiratory infection. These usually resolve within 1- 2 weeks.
What are the Means and Extremes of Proportions? A proportion is just an equation where two ratios are equal, and each piece of the proportion has a special name.
Distinguish proportional relationships (y/x = k, or y = kx) from other relationships, including inverse proportionality (xy = k, or y = k/x). Algebra: Proportion Word Problems - explanation and examples [direct and inverse proportion explained]