follow these steps:
1) y-4=7x^2
2) (y-4)/7 = x^2

so you must inverse x and y names:

Answer:
2
Step-by-step explanation:
the y-intercept is where the line meets the y-axis
Answer:
12,500 square millimeters
Step-by-step explanation:
The answer would be -142, because you have to keep subtracting 3 and I got -142