Research shows that income has a positive relationship with happiness (life satisfaction), although it is not a straight line.

研究表明，收入与幸福(生活满意度)呈正相关，但并非直接正相关。

youdao

So obviously, there's sort of a straight-line relationship here.

所以很明显，这里存在着某种线性关系。

youdao

When the stree strain relationship is the weak hardening, the relationship between stress ratio and strain incremental ratio shows the straight line with two different slopes.

当材料的应力应变关系为弱硬化型时，应力比与应变增量比关系为两段斜率不同的直线；

youdao

And you don't get a complete straight line but you get an interesting function that suggest that there's a relationship.

你不会得到一条完整的直线,但会得到一个有趣的函数,表明他们之间的某种关系

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