## aussy123 Group Title A = {(x, y): y >x2} help me graph 2 years ago 2 years ago

1. UnkleRhaukus

can you graph y=x^2

2. aussy123

No

3. UnkleRhaukus

ok lets make a table

4. aussy123

okay

5. UnkleRhaukus

lets have x for -3 to 3 |dw:1350917238347:dw|

6. UnkleRhaukus

if y=x^2 when x= -3 y= (-3)^2=

7. aussy123

9

8. UnkleRhaukus

good , so

9. UnkleRhaukus

|dw:1350917333290:dw|

10. aussy123

So you go down the table and make the equation y= x^2

11. UnkleRhaukus

can you fill in the rest of the table?

12. aussy123

okay

13. aussy123

|dw:1350917528971:dw|

14. UnkleRhaukus

|dw:1350917500305:dw|

15. UnkleRhaukus

good work, can you polt the rest of the points?

16. aussy123

yes

17. aussy123

|dw:1350917698467:dw|

18. UnkleRhaukus

very good, now if we connect these points, then the line will be y=x^2

19. UnkleRhaukus

but the question is y>x^2

20. aussy123

21. UnkleRhaukus

well if y is greater then x^2, the y values in the the shaded region must be of greater values than the y=x^2 curve

22. UnkleRhaukus

so shade the region above the curve

23. aussy123

Okay thanks, I think I have it now!!

24. UnkleRhaukus

some times it is good to choose a point and check it , say the point (0,1) which is above the curve, to check y>x^2 1>0^2 1>0 which is true, so the point is in the region

25. aussy123

ok thanks for clarifying that, I will use this method on the other questions!!

26. UnkleRhaukus

the last thing to mention is that the line in not included in the region because we are doing y>x^2 if we were doing y≥x^2, the line would be included

27. aussy123

Because of the greater than or equal sign????

28. UnkleRhaukus

so maybe draw a dashed line like this |dw:1350918432085:dw|

29. aussy123

okay is it possible to shade in more than one place?

30. UnkleRhaukus

yes

31. UnkleRhaukus

but you would need a complicated equation

32. aussy123

okay then