100,000,000 is 100 million
10,000,000 is 10 milllion
You can easily test this if you know that (6, -10) corresponds to (X, Y). Knowing this, you can:
X = 6
Y = -10
you put this into your equation:
-10 = 3*6 - 8
calculate it:
-10 = 18 - 8
-10 = 10
This is not true of course, -10 is not equal to 10. Therefore, (6, -10) is not a solution of y = 3x-8 :)
The answer is 1/2n-4
Multiplying a number n by 1/2 is the same as dividing that number by 2.
