Which of the following is an equation of a line perpendicular to the equation y= 3x + 1

Ineed with number 17 i don’t get it at alll

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left