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The table below shows the amount of money Sarah spends for a craft demonstration.

Number of People Attending
Cost
5
$15
8
$18
10
$20
15
$25

Sarah spends a total of $60. Based on the information in the table, how many people attended the craft demonstration?
20
30
50
70

Respuesta :

madiodougherty16

Answer:

50 people

Step-by-step explanation:

For 20 people she would spend $30

For 30 people she would spend $40

For 50 people she would spend $60

For 70 people she would spend $80

fichoh

Using the table of tables, a linear model representing the number of attendees and cost can be modeled using a linear regression calculator ; this the number of attendees of the total cost ls $60 is 50

The linear equation which models the relationship is :

  • y = x + 10
  • x = number of attendees ; y = cost

For a cost of $60 ; we could use the model to predict the number of attendees :

y = $60

60 = x + 10

60 - 10 = x + 10 - 10

50 = x

Therefore, there are 50 attendees.

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