Step-by-step explanation:
The best-fit line is:
Predicted height = 0.32 · Days in Soil − 1.72
This equation is a line written in slope-intercept form:
y = mx + b, where m is the slope and b is the y-intercept.
The slope has units of y/x, and the y-intercept has units of y.
The slope is 0.32. It has units of height / time = cm / day.
The slope is positive, so we expect the height to increase 0.32 cm in 1 day.
The y-intercept is -1.72. It has units of height = cm.
The y-intercept is the height on day 0.