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
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.