A data set contains an independent and a dependent variable. Which must be true of the data set if a linear function can be used to represent the data? The set must have a constant additive rate of change.
The set must have a constant multiplicative rate of change.
The values in the set must be positive.

Jonathan pays $1.90 per pound for potatoes. he buys 8.3 pounds of potatoes. he determines that he will pay $15.77, before tax, for the potatoes. which best describes the reasonableness of jonathan’s solution? jonathan’s answer is reasonable because there are two decimal places in the factors and two in the product. jonathan’s answer is unreasonable because there are three decimal places in the factors and two in the product. jonathan’s answer is reasonable because is 16, and 16 is close to 15.77. jonathan’s answer is unreasonable because is 8, and 8 is not very close to 15.77.

One integer is 8 times another. if the product is 72, then find the integers

Is this a polynomial function? i need to know asap