The relationship between the cost of cookies and the number of cookies is
a proportional relationship.
Correct response:
- c. The cookies at store B cost more
Method by which the above option is selected
The function of the given graph for the cost of cookies at store A is found as follows;
The graph is a straight line passing through the origin, therefore, the equation is of the form;
y = m·x
The cost of 2 cookies = $0.5
Therefore;
The cost of 1 cookie at store A = $0.5 ÷ 2 = $0.25
Therefore, the cost of y cookies = 0.25·x
Where;
x = The number of cookies
The equation representing the cost y for x cookies in store B in dollars is given as follows;
y = 0.30·x
Therefore, the cost of 1 cookie at store B = $0.30 × 1 = $0.30
Therefore;
- The cookies at store B cost more
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