Aline whose slope is 4 and passes through the point (0, -9) lies on the line whose equation is:
a.4x y = -9
b.4x - y = 9
c. y - 4x = 9

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220