In general, a good math model for a sine wave is: y=A*sin(ωt+Φ) Let’s dissect what this equation to see what it’s all about. The sine angle is in radians and ω is the frequency in radians.

Frequency tables can be used to help present sets of data. There are 4 children aged 10, which gives a total age of 40 in that category. There are 6 children aged 11, which gives a total age of 66 ...