Do these ratios form a proportion?
16 bikes: 20 cars
36 bikes : 45 cars

Asap! i'm not good math and i'm lost.

Which graph represents the linear function below? y-3=1/2(x+2)

Determine the required value of the missing probability to make the distribution a discrete probability distribution. x p(x) 3 0.23 4 ? 5 0.51 6 0.08 p(4) = nothing  (type an integer or a decimal.)