Removing the variable led to an improved model even though R^2 decreased. Removing the variable led to a worse model because R^2 should always increase, regardless of what happened to s. Removing the variable led to a worse model because s should always increase, regardless of what happened to R^2.

a

step-by-step explanation:

a) 0,0; 1,1; and 2,2

step-by-step explanation:

these have the exact same coordinates, thus they are the correct function.

168

step-by-step explanation:

first off, we know that he drove 3.5 hours at a rate of 48 mph.

knowing that, we want to see how many miles he drove all-together.

in this case, we can just multiply 48 by 3.5.

48 * 3.5 = 168