How can sample data be used to form an estimate about the population? Use the drop-down menus to explain your answer. A(n) can be written to relate the sample to the and solved to form an estimate.

$649.60

step-by-step explanation:

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

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6: 4= 3/2

18: 8= 9/4

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