一いち次じ関かん数すういちじかんすうMeanings1nounlinear functionmathematicsMathematical term for a function of the form y = ax + b, where a and b are constants.一いち次じ関かん数すうのグラフは直ちょく線せんになる。The graph of a linear function becomes a straight line.中ちゅう学がく数すう学がくでは一いち次