A medical doctor diagnosed a patient of jaundice and recorded the following variables:
(i) Temperature, (ii) Patient number, (iii) Weight.
What will be the respective scales on which the variables will be measured?

The variables are:

Temperature: The variables for this can be Celcius degrees or Farenheit degrees, depending on where the medical doctor is from.

Patient number: this can be any integer number, as the patient is received in the hospital they assign him a number.

Weight: We commonly hear that the unit for weight is "grams", while the actual unit is called is "gram force", because gram is a unit of mass, and weight is actually a force, so here the correct unit is "gram force" or "kilogram force" (that are equivalent)

570, the answer is 570, hope it

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x