31. If the slope is 1 and y-intercept is 4. What is the equation of a line?
A. X-y=-4
C. x+y=4
B. 4x-y=-4
D. 4x+y=4
32. What is the equation of the line that passes through (8,-8) and having slope 7?
A. 7x-y=64
C. 8x-8y=16
B. 7x+y=8
D. 8x+y=16
33. Determine the equation of the line passing through the points (3,5) and (-4,1)
A. 4x-7y=-23
0-6-. C. 4x+7y=-23
B. 4x+7y=23
0 D. 4x-7y=23​