Question 106554
Equation for a line: y=mx+b

m=slope
b=y intercept

2. a) m=4    point (0,2)

y=4x+b

substitute (0,2) into the equation y=mx+b
0=x
2=y

2=4(0)+b
2=0+b
2=b

Therefore, y=4x+2



2.b) m=-5   point (3,4)

y=-5x+b
4=-5(3)+b
4=-15+b
4+15=b
19=b

Therefore, the equation of the line is y=-5x+19


2.c) m=0  point (1,2)

2=0(1)+b
2=0+b
2=b

Therefore, y=2