Hi,
The answer is c. The sample is biased.
This is because the sample is taken on a single state, an Rebecca reports a statistic about the nation. Her data contains information only of her state. If she lives in a very cold state, there is probably more homeowners using electric heat than in a hot state.
1/3 is the slope, or 1 over 3.
Multiply 3 with 7.
3 * 7 = 21
The value of the gift card changed by -$21 dollars.
Answer:
x=4
Step-by-step explanation:
