Y-(-1)=1.25(x-(-1))

Solution for Y-(-1)=1.25(x-(-1)) equation:

Simplifying
Y + -1(-1) = 1.25(x + -1(-1))

Multiply -1 * -1
Y + 1 = 1.25(x + -1(-1))

Reorder the terms:
1 + Y = 1.25(x + -1(-1))

Multiply -1 * -1
1 + Y = 1.25(x + 1)

Reorder the terms:
1 + Y = 1.25(1 + x)
1 + Y = (1 * 1.25 + x * 1.25)
1 + Y = (1.25 + 1.25x)

Solving
1 + Y = 1.25 + 1.25x

Solving for variable 'Y'.

Move all terms containing Y to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + Y = 1.25 + -1 + 1.25x

Combine like terms: 1 + -1 = 0
0 + Y = 1.25 + -1 + 1.25x
Y = 1.25 + -1 + 1.25x

Combine like terms: 1.25 + -1 = 0.25
Y = 0.25 + 1.25x

Simplifying
Y = 0.25 + 1.25x