Which graph(s) shows a proportional relationship?

What is the product? (x2+3y+7) [yy+1)

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f