R Squared from Sums

Problem

The coefficient of determination is R^2 = 1 - SSE / TSS.

Given the residual sum of squares and the total sum of squares (TSS > 0), return R^2.

Hint

It is the fraction of variance not left in residuals.

case 1

in: [10,100]

expected: 0.9

case 2

in: [0,50]

expected: 1

case 3

in: [25,25]

expected: 0

Starter codePython

def r_squared_from_sums(sse, tss):
    # Your code here
    pass

3 test cases · run your code against them in the editor