In the table below, y is a linear function of x. What is the vlaue of y when x = 0?
Note that when x changes by - 2, y changes by 8
So when x changes by -1, y changes by 4
So...we can solve this
( 3 - 0) / ( 5 - y) = -1 / 4
3 / (5 - y) = -1/ 4 cross-multiply
3*4 = -1 ( 5 - y)
12 = - 5 + y
12 + 5 = y
17 = y
