英數兩全字詞教學

82   比例式 Proportion

1. proportion   比例，比例式

2. proportionality   比例關係

3. is proportional to   \(\propto\)，正比於

4. in direct proportion   成正比

5. in inverse proportion   成反比

6. tax rate   稅率

7. exchange rate   匯率

8. rate of change   變化率

9. the constant of proportionality   比例常數

10. y is proportional to one over x   \(\displaystyle y\propto \frac{1}{x}\)

11. two variables are in proportion   兩個變數成正比

12. a and b are in the proportion of c and d   \(a:b=c:d\)

13. x to x naught is equal to y to y naught   \(x:{{x}_{0}}=y:{{y}_{0}}\)

14. the change in y depends upon the change in x   y 跟隨 x 改變

15. A rate is the quotient of a ratio where the quantities have different units.   比率是指不同單位的兩個量的比值。