y=-0.1(x-30)2+90

Solution for y=-0.1(x-30)2+90 equation:

Simplifying
y = -0.1(x + -30) * 2 + 90

Reorder the terms:
y = -0.1(-30 + x) * 2 + 90

Reorder the terms for easier multiplication:
y = -0.1 * 2(-30 + x) + 90

Multiply -0.1 * 2
y = -0.2(-30 + x) + 90
y = (-30 * -0.2 + x * -0.2) + 90
y = (6 + -0.2x) + 90

Reorder the terms:
y = 6 + 90 + -0.2x

Combine like terms: 6 + 90 = 96
y = 96 + -0.2x

Solving
y = 96 + -0.2x

Solving for variable 'y'.

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

Simplifying
y = 96 + -0.2x