The coefficient of multiple determination r2y.12
a. measures the proportion of variation in y that is explained by x1 and x2.
b. measures the variation around the predicted regression equation.
c. will have the same sign as b1.
d. measures the proportion of variation in y that is explained by x1 holding x2 constant.

$450

step-by-step explanation:

first, you have to multiply 150x2=300

next, you have to add 150+300= 450

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)

time is equal to distance over rate so

t = d/r

need a little bit more information for the second question.

it is rigid.; it is isometric. ; the size is preserved.

step-by-step explanation:

a translation is called an isometry; these are transformations that preserve congruence between pre-images and images.

they are also called rigid transformations, as the only thing that can happen to a pre-image is that it is moved or turned, not stretched or shrunk.

since congruence is preserved, the size is preserved.