Which equation represents a proportional relationship that has a constant of proportionality equal to 2? y = x + 2
y = x/2
y = 2 x
y = 2

pls hurry

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Charlie tosses five coins.what is the probability that all five coins will land tails up.