Mrs. Jackson gives the table below to her students.
2 answers:
The answer is m = 20 because the rate of change is –3.
We can see that the difference between 26 and 23 is 3. Because the values are going down as x goes up, that means the change is negative. Therefore, the rate of change is -3.
According to the table, if x increases by 1 from 4 to 5, y decreases by 3.
Also, if x increases by 1 from 5 to 6, y must be 3 less than 23, or 20, for all 3 points to be collinear.
m = 20 because the rate of change is –3.
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