## Emily778 2 years ago Which choice describes the translation represented by the translation rule (x,y) -->(x+4, y-1)? (1 point) 4 units to the right and 1 unit down 1 unit to the right and 4 units down 4 units to the left and 1 unit up 4 units to the left and 1 unit down

1. Emily778

@johnweldon1993

2. Emily778

@jim_thompson5910

3. jim_thompson5910

x to x+4 means you're taking some x coordinate and turning it into x+4

4. jim_thompson5910

visually, you're translating the point 4 units to the right

5. jim_thompson5910

y to y-1 means what?

6. Emily778

thanks. I already figured it out though. xP

7. jim_thompson5910

ok great, glad you were able to figure it out

8. Emily778

Can you help with this? The hexagon GIKMPR and FJN are regular. The dashed line segments form 30° angles. Find the angle of rotation about O that maps JK to FG. 90° 240° 150° 120°

9. jim_thompson5910

one sec while I draw

10. Emily778

K

11. jim_thompson5910

how many angles have I highlighted?

12. Emily778

5

13. jim_thompson5910

each angle is 30 degrees, so the answer is 5*30 = 150

14. Emily778

What about this one? The hexagon GIKMPR and FJN are regular. The dashed line segments form 30° angles. Find the angle of rotation about O that maps P to G. (1 point) 240° 120° 210° 270°

15. Emily778

the picture is the same

16. Emily778

@jim_thompson5910

17. jim_thompson5910

ok drawing it out

18. jim_thompson5910

how many angles did I mark below?

19. Emily778

8

20. jim_thompson5910

21. Emily778

why times 30?

22. Emily778

and I really don't get this. Find the degree of rotation about the spinner center that maps label i to label g. (1 point) 72° 108° 36° 288°

23. jim_thompson5910

because each angle I highlighted is 30 degrees

24. jim_thompson5910

the other one, you're going 2 spots over each angle is 36 degrees, so you're going a total of 2*36 = ??? degrees

25. Emily778

72

26. jim_thompson5910

yep