Algebra 1 Common Core Student Edition, Grade 8-9

42-43. Answers may vary. Samples are given.

42. y = 0.25x + 5.05 43. y = 12.5x


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Ch ap t er Re v i e w p p. 3 5 3 - 3 5 6

1. interpolation 2. rate of change 3. point-slope form


2. opposite reciprocals 5. line of best fit 6.-1 7. 0 8. 3


3. undefined 10. 3 11. - j 12. y = -2x; -14


4. y = |x ; y- 14. y = j7 15. y=-x; -7 16. no


5. yes; y = - 2. 5 x 18. y = 4 19. y = x - 5


6. y = |x + 1 21. y = -x- 1
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    25. 
        
    
    
    
    


25. y=5x-11 27. y=9x-5 28. Parallel;
    the slopes are equal. 29. Neither; the slopes are not
    equal or opposite reciprocals. 30. y = ^x + 4


26. y = - |x + y- 32. negative correlation


27. no correlation 34. positive correlation

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Get Ready! p. 361

1. identity 2. 1 3. no solution 4. 3 5. 1.5 6. no solution


2. x< 3 8.r<35 9.f>-13 10. f> -2 11.s>^


3. x>-18 13a. 2x-1 b. A = ^ x (2 x - 1 )
   c. 248 cm2

| Select ed A n sw ers _ 8 8 9

Heights and

Arm Spans

Height (m)

b-d. Answers may vary. Samples are given.

b. y = 0.96x - 0.01 c. about 1.5 m d. about 2.1m

Ch ap t er 6

Selected

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