Which is an equation of the line that passes through the points (2, 15)
and (-1, 3)?
A. y = 4x + 7
B. y = 6x + 3
C. y = 9x - 3
D. y = 12x - 9

Which rational number could be graphed between -4 and -5

What is best way to getting answer for my exam is

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.