Answer: 5
B/c 5+1= 6 and 5 times 6 is 30
Answer:
11. 
Step-by-step explanation:

Substitute





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Answer:
11. -2
12. +0.5
Step-by-step explanation:
11. as x increases by 1, y decreases by 2, -2/1 = -2 the ROC is -2 (rate of change)
12. as x increases by 2, y increases by 1, 1/2 = 0.5, ROC is +0.5
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