What is a conjecture about the value of r for the given scatterplot, and what might be the equation of the least squares regression line?
a) r > 0, LSRL equation: y = mx + b
b) r < 0, LSRL equation: y = mx + b
c) r = 0, LSRL equation: y = mx + b
d) r = 1, LSRL equation: y = mx + b