19. which of the following is the equation of the line whose m is 4 and y-intercept is 0?

a. y = 4x + 1
b. y = 4x + 2
c. y = 4x
d. y = x + 4

21. state the region bounded by the inequality 2x
+ y < 1

a. within the line
b. above the line
c. below the line
d. non existing

22. Find the equation of the line of the form y = mx + b that passes through the pair of points (7/2,1) and (-1/2,2)

a. y = - 1/4x + 15/8
b. y = - 1/4x - 15/8
c. y = - 1/4x + 7/8
d. y = - 1/4x - 7/8​