X y
0 0
1 5
2 10
3 15
The answer is y = 5x
we can check this by plugging in the numbers from the table:
5 = 1(5)
5 = 5
This makes this answer correct because it makes the equation true.
Centre is at the middle or the midpoint of the diameter.
And the formula of midpoint is

For the given question, x1=-4, y1=2, x2=2, y2=-8
So we will get

And that's the required centre .
<span>Equation A: 4c = d − 8
</span><span>Equation B: c = 5d + 8
</span>
Multiply Equation A by -5:
Equation A: - 20c = -5d + 40
Equation (1) + (2) :
-19c = 48
Answer: <span>B. Multiply equation A by -5</span>