Which equation represents a linear function?
equation 1: y = 2x2 + 1
equation 2: y = 8x + 1
equation 3: y = 5x3 – 1
equation 4: y2 = 4x – 1

a. equation 1
b. equation 2
c. equation 3
d. equation 4

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is