Calculus
Interval 区间 Domain 定义域—codomain 值域 Inverse Functions 反函数 （就是把这个函数的y=fx变成x=fy）
Convex: straight line between both points is entirely above Concave: straight line between both points is entirely below Polynomial functions 多项式函数 quadratic function 二次函数 Exponential 指数 Logarithmic 对数 power-law function
derivative 导数 tangent 切线 stationary point 驻点，导数为0 RSS(residual sum of squares) 残差平方和(见上图) y-intercept y轴截距 integral 积分 Indefinite integral ≈ antiderivative 不定积分