线性回归方程 vs Mathfuns

线性回归方程，用计算器要按好久，按完了还不知道对不对，用这个软件来复查一下吧。

Mathfuns aims at solving mathematical problems in all stages from primary school, junior high school, senior high school to university. It uses its unique computing engine to provide problem-solving services for teachers, students and engineers.You only need to input the formula to get what you want: answer, drawing, association description and analysis, etc.Mathfuns is committed to the simplification of complex mathematical problems to make mathematics easier. Mathfuns is a new universal super calculator. Mathfuns = Formula editor + Graphing calculator + Super calculator + Step solver + Geometric sketchpad. Function highlights ● Powerful formula editing ability ● Standard, scientific and profession computation modes ● Unique computing engine, supporting a variety of computing types ● Typical mathematical problems, a variety of problem-solving methods and detailed steps ● Interactive plotting (2d, 3d) ● Function image and property analysis ● Geometry and analysis ● Support hardware keyboard Calculation type ●Algebra: Real number, complex number, constant, power, exponent, logarithm, factorial, polynomial, trigonometric function, hyperbolic function, summation, product ●Set: Inclusion, subset, proper subset, intersection, union ●Matrix: Determinant, rank, inverse, transpose, conjugate, decomposition, eigenvalue, eigenvector ●Calculus: Limit, derivative, partial derivative, integral, multiple integral ●Equation: Algebraic equation, inequality equation, trigonometric equation, ordinary differential equation, partial differential equation ●Vector: Dot, cross ●Statistics: Maximum, minimum, average, standard deviation, variance, die, binomial distribution, poisson distribution, uniform distribution, exponential distribution, normal distribution, chi square distribution, t distribution, F distribution ●Plot: Points, polylines, functions, parametric equations, implicit functions, polar equations ●Plane geometry: Point, segment, line, circle, ellipse, triangle, polygon ●Space geometry: Point, line, plane Geometric sketchpad ●Basic operation: Select,pan,delete,clear ●Point,midPoint,split ●Segment,fixed length line,ray,vector,polyline, perpendicular line,perpendicular bisector,parallel line,equal vector,angle bisector,tangent line,polar line ● Polygon,regular polygon ●Circle,circular arc, sector ●Measure: Coordinate,equation,length,distance,angle,slope,perimeter,area,radius,arc Length More types, more surprises, looking forward to your exploration! When confirming the purchase, payment will be charged from your Apple ID account. Unless cancelled at least 24 hours before the end of the current period, the subscription will automatically renew. Your account will receive a renewal fee within 24 hours before the end of the current period. You can go to the account settings on the App Store to manage and unsubscribe after purchasing. The discounts and prices are subject to change without prior notice. Term of service https://mathfuns.com/servagree Privacy Policy https://mathfuns.com/policy Contact us Website: www.mathfuns.com Mailbox: mathfuns@hotmail.com QQ Group: 554100855 Sina Weibo: Mathfuns