In the table, x represents the age in years of a collectible baseball card, and y represents its value in dollars. Cost of a Pack of Baseball CardsAge in years, xValue in dollars, y50.75105.751510.752015.75Which statement is correct about the slope of the linear function that the table represents?
Answer
A
The slope is positive because as the age decreases, the value increases.
B
The slope is positive because as the age increases, the value increases.
C
The slope is negative because as the age decreases, the value decreases.
D
The slope is negative because as the age increases, the value decreases.
Explanation
As the card’s age increases from 5 to 10 to 15 to 20 years, its value increases from $0.75 to $5.75 to $10.75 to $15.75. Since both age and value increase, the slope is positive. Choice B correctly states that the slope is positive because as the age increases, the value increases.
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