Answer:

Step-by-step explanation:
To find the inverse of y=4x+12, all you need to is swap x an y and then remake y the subject.
y=4x+12
Swap x and y:
x=4y+12
Solve for y:
Subtracting 12 on both sides:
x-12=4y
Dividing 4 on both sides:

So 
Lower extreme- 8
Lower quartile- 20
Median- 30
Upper quartile- 35
Upper extreme- 42
Hope this helps!
Answer:
1.
Step-by-step explanation:
When x is 0, the point will lie on the x-axis, so we need to find how many times this happens.
There's only 1 0, so the answer is 1.