Joan has a credit card that uses the previous balance method. The opening balance of one of her 30-day billing cycles was $6390,
2 answers:
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Answer:
42
Step-by-step explanation:
Given:
The table of values.
x: 12 7 2
y: 8 10 12
To find:
The rate of change.
Solution:
If two points are given then the formula for slope or rate of change is
Consider any two points from the given table.
Consider the two points (12,8) and (7,10). So, the rate of change is
Therefore, the correct option is b.