## anonymous one year ago If g(x) = x^2 - 2x, find g(4n)

1. anonymous

@jim_thompson5910

2. jim_thompson5910

|dw:1438040736722:dw|

3. jim_thompson5910

Replace every x on the right side with (x) basically enclose the x terms in parenthesis |dw:1438040784609:dw|

4. jim_thompson5910

Then replace every 'x' with '4n' |dw:1438040809741:dw|

5. jim_thompson5910

|dw:1438040835070:dw|

6. jim_thompson5910

I'll let you simplify

7. anonymous

so 16n^2-8n?

8. jim_thompson5910

you are correct

9. anonymous

can you look at one more?

10. jim_thompson5910

sure

11. anonymous

The ordered pairs (0, 1), (3, 2), (3, -5), and (5, 4) are on the graph of a relation between x and y. Which of the following statements is true. x is a function of y. y is a function of x.

12. jim_thompson5910

Do any of the points have repeated x values?

13. anonymous

yea (3,2) and (3, -5), so its not a function

14. jim_thompson5910

specifically y is not a function of x

15. jim_thompson5910

if we plug in x = 3, we don't know what will come out. The rule is that exactly one output must come out for any given input

16. anonymous

thanks!

17. jim_thompson5910

you're welcome