If f is a linear function such that f(x+2)–f(x)=6, find the value of (f^-1)(x+2)–(f^−1)(x).

Several paint mixtures are made by mixing blue paint and white paint. paint colors blue paint white paint mixture a 5 cups 12 cups mixture b 6 cups 6 cups mixture c 4 cups 12 cups mixture d 5 cups 6 cups which mixture has the highest ratio of blue paint to white paint