Fourth grade math, how to draw two points and then a new point not on either of those two points

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

Mackenzie needs to determine whether the rectangles are proportional. which process could she use? check all that apply.

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap