Suppose the line of best fit for the height, y, of a plant measured in millimeters after receiving x hours of sunlight is y = 1.7x + 9.7. What is the
meaning of the slope of the line of best it?

The plant is initially 1.7 millimeters tall,

The plant is initially 9.7 millimeters tall.

The plant grows at a rate of 17 millimeters for every 10 hours of sunlight it
receives

The plant grows at a rate of 10 millimeters for every 17 hours of sunlight it
receives