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During the month of February, Lerato sends one SMS per day to relatives. Calculate how much this activity costs her in rands

Respuesta :

Considering a linear function, it is found that this activity costs 240 rands.

What is a linear function?

A linear function is modeled by:

[tex]y = mx + b[/tex]

In which:

  • m is the slope, which is the rate of change, that is, by how much y changes when x changes by 1.
  • b is the y-intercept, which is the value of y when x = 0, and can also be interpreted as the initial value of the function.

In this problem, we suppose that:

  • There is a fixed cost of 100 rands, hence b = 100.
  • Each SMS costs 5 rands, hence m = 5.

Hence, the cost of sending x messages is given by:

y = 5x + 100.

February has 28 days, hence:

y = 5(28) + 100 = 240

This activity costs 240 rands.

More can be learned about linear functions at https://brainly.com/question/24808124

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