What is the slope of the line that passes through the points below? begin mathsize 18px style open parentheses negative 7 over 3 comma space 3 close parentheses space text and end text space open parentheses 2 over 3 comma space minus 6 close parentheses end style A. begin mathsize 18px style negative 1 third end style B. begin mathsize 18px style 1 third end style C. -3 D. 3