Question

y=2x+4

Answer 1

x intercept: y=0
2x+4=0
2x=0-4
2x=-4
x=-4/2
x=-2
when y is 0, x is -2 (-2,0)

Answer 2

y intercept: x=0
2(0)+4=y
0+4=y
y=4
when x is 0, y is 4 (0,4)