Final answer:
The percent change when the price changes from $35 to $60 is a 71% increase after rounding to the nearest whole percent, making the correct answer c) 71% increase.
Step-by-step explanation:
To calculate the percent change when a price changes from $35 to $60, we use the formula:
Percentage Change = (Change in Price / Original Price) x 100%
In this case, the change in price is $60 - $35 = $25. The original price is $35.
Thus, the percentage change is: ($25 / $35) x 100% = 0.7142... x 100% ≈ 71.4%.
Rounded to the nearest whole percent, the answer is approximately 71%. Since the price went up from $35 to $60, it is an increase. Therefore, the correct answer is c) 71% increase.