Question

The graph shows the total sales for the month as a function of number of cake tiers.

Which statements are true?
Select each correct answer.

The graph shows the sales increasing without bound.

Sales increased by $3,000 when 4-tier cakes were created.

The sales decreased when cakes were sold in tiers.

Sales increased more between the selling of the 3- and 4-cake tiers than the 1- and 2-cake tiers.

The graph's domain is such that x is equal to or greater than 0.