Final answer:
To determine the percent change of x, subtract the original value from the new value, divide by the original value, and multiply by 100% ,so we get the percent change of x is 250% .
Step-by-step explanation:
To determine the percent change of x, we can use the formula:
Percent Change = (New Value - Original Value) / Original Value * 100%
In this case, the new value is 3.5x and the original value is x. Plugging these values into the formula, we get:
Percent Change = (3.5x - x) / x * 100%
Simplifying the equation, we have:
Percent Change = 2.5x / x * 100%
The x's cancel out, leaving us with:
Percent Change = 2.5 * 100%
Therefore, the percent change of x is 250%.