A biologist measured the length and mass of 20 rep length, in centimeters, and \( y \) is the mass, in grams. Based on the equation, what is the approximate len A. 62 cm B. 66 cm C. 70 cm D. 75 cm

It looks like your question is missing some important information, particularly the equation that relates length (\( x \)) to mass (\( y \)). To provide an accurate answer, I would need the specific equation or additional details about the relationship between length and mass that the biologist established. If you can provide the regression equation or any additional context, I'll be happy to help you determine the approximate length based on the given options. **Example of How to Proceed:** If the equation were, for example: \[ y = 2x + 30 \] and you were asked to find the length (\( x \)) when \( y \) (mass) is a certain value, you could solve for \( x \) accordingly. Please provide the missing equation or any further details, and I'll assist you accordingly!