Which vectors represent the reflection of the vector <3, -7> across the x-axis?

Me with this one question, and i'll upvote the brainliest answer

Kayla made observations about the sellin price of a new brand of coffee that sold in the three different sized bags she recorded those observations in the following table 6 is $2.10 8 is $2.80 and 16 is to $5.60 use the relationship to predict the cost of a 20oz bag of coffee.

Write the equations in logarithmic form 7^3=343