Question

Which linear equation passes through the point (10,-7)

Answer 1

Y = -7
or
x = 10
or
y = x - 13
there can be endless answers

Answer 2

y = ax + b

y = -7

x = 10

-7 = a.10 + b

10a + b = -7

We can put some random values, if a = 1

10.1 + b = -7

10 + b = -7

b = -7 - 10

b = -17

So, we can say that the equation y = x - 17 pass through (10, -7)