## anonymous one year ago i will fan and medal

1. anonymous

Which of the following expressions is the inverse of the function y equals quantity x minus 2 divided by 3? y = 3x + 2 y = 2x + 3 y equals quantity x minus 3 divided by 2 y equals quantity x plus 2 divided by 3

2. anonymous

What does "quantity x minus 2 divided by 3" look like?

3. anonymous

y = x - 3 / 2

4. anonymous

So would it be $y=x-\frac{3}{2}$

5. anonymous

nah

6. anonymous

Nah? Can you draw it out then?

7. anonymous

|dw:1433789950204:dw|

8. anonymous

9. anonymous

Which of the following expressions is the inverse of the function y equals quantity x minus 2 divided by 3? Which of the following expressions is the inverse of the function $$y = \dfrac{x - 2}{3}$$? Does that look right to you, as your question?

10. anonymous

why you don't study well?

11. anonymous

yup

12. anonymous

i came here for help @k142

13. anonymous

14. anonymous

15. anonymous

It is okay. I just wanted to tell you that way will never help you and you'll fail your exams.

16. anonymous

17. anonymous

can you help @Algorithmic because @k142 is just giving me advice

18. anonymous

smh

19. anonymous

$y^{-1} = \dfrac{x - 2}{3} \implies x = \dfrac{y - 2}{3} \implies 3 \times x = \dfrac{y - 2}{3} \times \dfrac{3}{1}$ $3x = y - 2\implies 3x + 2 = y$ Did you understand all that?

20. anonymous

Basically switch out $$y$$ to $$x$$, then try for isolate $$y$$.

21. anonymous

why did u put 3*x

22. anonymous

and the 3 over 1

23. anonymous

This $$3 \times x = \dfrac{y - 2}{3} \times \dfrac{3}{1}$$ is the same as $$\dfrac{3}{1} \times x = \dfrac{y - 2}{3} \times \dfrac{3}{1}$$. The $$\dfrac{3}{1}$$ is used to cancel out the three under the $$y - 2$$ numerator. $\dfrac{3}{1} \times x = \dfrac{y - 2}{\cancel{3}} \times \cancel{\dfrac{3}{1}}$

24. anonymous

i understand now <3

25. anonymous

$$\dfrac{3}{1} \times x$$ simplies to $$3x$$.

26. anonymous

All right, great.

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