Which table represents a linear function?

The first table, 1 = 1/2, 2=1, 3=1 1/2, and 4=2

Step-by-step explanation:

This is because the table is increasing at a constant and consistent rate which makes it a linear function.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

total amount to be paid = $19.5

step-by-step explanation:

given ,

original price = $25.99

discount = 25%

discount amount = 25% of original price

discount amount = 25/100   * 25.99

discount amount = $6.49

hence , the total amount to be paid = original price - discount amount

                                                            = $25.99 - $6.49

                                                            =$19.5

total amount to be paid = $19.5