Question

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Answer 1

The constant of proportionality in terms of the cost per text is the coefficient of
`t` in the equation
`b=0.25t`. Since the coefficient of
`t` is 0.25, the constant of proportionality in terms of the cost per text is 0.25.
Proportionality constants are usually expressed as fractions, so lets convert 0.25 to a fraction. To do that we are going to add the denominator 1 to our decimal, and then we will multiply both numerator and denominator by ten for every number after the decimal point:

`(0.25)/(1)`

`(0.25)/(1) . (100)/(100) = (75)/(100)`
Finally, we can simplify our fraction:

`(25)/(100) = (1)/(4)`

We can conclude that the constant of proportionality in text of the cost per text is 1/4