Initially, I wanted to use matrix. Then I see this question is simple

To be not in quadrant I, the line must have negative slope or slope=0 with negative or zero y-intercept in both cases. It is 13, and answer must be
C23-2/3*(15)=13
GeminiHeat wrote:
A student draws 35 lines in the XY plane, none of which are vertical and 15 of which have a positive slope. Of those with positive slope, 1/3 also have a positive Y-intercept. If 23 lines have a Y-intercept less than or equal to zero, how many lines contain no point in Quadrant I?
A: 0
B: 7
C: 13
D: 20
E: 35