9. A. She used y-values where she should have used x-values.

B. She did not keep the order of the points the same in the numerator and the denominator.

C. She mixed up the x- and y-values.

D. She should have added the values, not subtracted them.

B. She did not keep the order of the points the same in the numerator and the denominator.

Step-by-step explanation:

The formula to calculate slope is:

She instead used this formula:

The student made the mistake of not keeping the numerators and denominators in the same order.

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9