I have two questions please answer this

Question

The table shows the cost of sitting fee and each 5*7 portrait at two photography studios.

    This is the table:

  studio:       Sitting fee ($)     5*7 price ($) 

  Lifetime          18                       15

  photos: 

  Family            12                       15        

  photos:

write an equation to represent Y the total cost of having your photos taken and X the number of 5*7s you get from each studio.

Answer 1

For the Lifetime Studio, the function is y = 15*X + 18

 

and for the Family Photos, the function is y = 15*X + 12