Tip and sales tax cause a restaurant bill
a. increase
b. decrease
c. stay the same
d. be unaffordable

when estimating using money for a purchase, you
a. round up
b. round down
c. estimate up to the nearest dollar or half dollar
d. estimate down to the nearest dollar or half dollar

you purchase a piece of cake for $3.49. what would be a good estimation for just purchasing the cake?
a. 3.00
b. 3.50
c. 4.00
d. 3.75

your total restaurant bill for food, drinks, and tip is $37.40. what is a good estimate cost for just the food and drinks?
a. 33.50
b. 37.00
c. 36.00
d. 34.00

1)A sales tax is a tax paid to a governing body for the sales of certain goods and services.

Tip and Sales tax cause a restaurant bill to a) Increase.

2)  When estimating using money for a purchase, you should  c. estimate up to the nearest dollar or half dollar

3)While purchasing any item we round the price to nearest cents .  $3.49 rounded to nearest cent is $3.50. Option b. 3.50  is the right answer.

4) The total restaurant bill consists of   bill for food, drinks, and tip .The restaurant bill is $37.40.  including tip then cost of food ,drinks only  will be less than $37.40. The estimated cost for just the food and drinks is d. 34.00

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