The given equation is a slope intercept form of a line. In which,
y = mx + b
where: y = y coordinate
x = x coordinate
m = slope
b = y-intercept
In the equation, y = 0.39x + 15.89. The y-intercept is 15.89 or approximately 16. Meaning at x = 0, there's already approximately 16 dogs visiting at the park.
Therefore, the answer is the last statement.
ANSWER: The y-intercept of the line is 15.89, meaning that on the day the dog park opened, there were about 16 dogs visiting the park.
