adj.直系的，嫡系的

The function f(x) = 2x is a linear equation.
函数f(x) = 2x是一个线性方程。
In a linear relationship, the graph forms a straight line.
在线性关系中，图表形成一条直线。
The cost of production increases linearly with the quantity produced.
生产成本与生产量成线性增加。
The speed of sound in air is approximately linearly proportional to its temperature.
空气中声音的速度大约与其温度成线性比例。
A linear regression model was used to predict stock prices.
使用了线性回归模型来预测股票价格。
The equation y = mx + b represents a straight line in a Cartesian coordinate system.
方程y = mx + b在笛卡尔坐标系中表示一条直线。
The growth of bacteria in a Petri dish often follows a linear pattern initially.
培养皿中细菌的增长初期往往遵循线性模式。
The equation of a straight line on a graph is given by y = mx + c, where m is the slope and c is the y-intercept.
图表上直线的方程由y = mx + c给出，其中m是斜率，c是y轴截距。
Linear equations are easy to solve as they have only one variable and a constant term.
线性方程易于求解，因为它们只有一个变量和一个常数项。
The concept of linear programming is widely used in optimization problems.
线性规划的概念在优化问题中被广泛使用。