Question

Nike and Adidas are having a huge sale for the next 5 days. Create a graph to determine if the shirts and cost are proportional.

A) Is the number oft-shirts proportional to the cost?

B) Write an equation to illustrate the relationship between the number of t-shirts and cost?

C) Using the equations predict the cost of 20 shirts sold.

D) 1%at docs the point (5, 35) represent in the context ofthc situation pertaining to Nike?

E) Which company has the better cost per shirt?​

Answer 1

price of $8 per shirt.

Comparing the prices, Nike has better cost

Answer 2

See the graph with both lines attached

A) From the tables we see the constant change of values in the second column and the initial value is zero.

• This represents a proportional relationship.

B) Rate of change is 7 per shirt, the equation is:

• y = 7x, where y is cost, x - is the number of shirts

C) When x = 20,

• y = 7*20 = 140
• Cost of 20 shirts is $140

D) The point (5, 35) represents that:

• The cost of 5 shirts is $35

E) The second table has confusing titles (not about the number or cost of shirts) but if we assume its same as the first table, then Adidas has greater price of $8 per shirt.

Comparing the prices, Nike has better cost