can anyone help with the next part on this TBT please im really struggling please help with 6 and 8 please and please show work

Answer:
6. x=10
8. B
Step-by-step explanation:
6. The x intercept is when y=0
Let y=0
4x -5(0) = 40
4x = 40
Divide by 4
4x/4 = 40/4
x = 10
The x intercept is 10
8. f(0) means x=0
The point on the y axis is B