Concept explainers
For the data in each table, tell whether
If it does, write an equation for the direct variation.
To Find: Whether y varies directly with x . If it does, write an equation for the direct variation.
Answer to Problem 18P
Yes! y varies directly with x . The equation is
Explanation of Solution
Given information: The table of values are
X | y |
2 | -2.5 |
-7 | 8.75 |
5 | -6.25 |
Formula used: When y varies directly withxthen the equation is
Calculation:
Let’s find the k value for each pair of points.
Hence constant of variation is constant -1.25. So, y varies directly with x .
Now, substitute k as -1.25 into the equation
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