Trigonometry is used in finding distance and angles, there are six trigonometric ratios sine, cosine, tangent, cosecant, secant, cotangent and all these trigonometric ratios are abbreviated as \(\sin,\ \cos,\ \tan,\ \csc,\ \sec,\ \cot.\)
A graph is a picture which is designed to express words.
To explain the logistic modeling of population data
A graph of this equation yields an S-shaped curve, it is more-realistic model of population growth than exponential growth. The courses become scarce as the population expansion decreases and leveling off when the carrying capacity is reached and resulting in an S-shaped curve in the logistic growth.