Hello from MrBillDoesMath! 
 
Answer: 
 See discussion below
Discussion: 
Slope of the line through the points (3,2), (6,4) is 
(4-2)/(6-3) = 2/3
a. "The line has a slope of 3/2". False, the slope is 2/3 not 3/2
b. True, as y = (2/3)x (which is a direct variation)
c. "The line has a slope of 2/3". True
d. "The point (-6,9) is also on the line" Let's check. Does
 y = (2/3) x 
 9 = (2/3) (-6) = -4 ?
 No, so the above statement is False.
 
Thank you, 
 
MrB