Determine which relation is a function.
a.
{(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}
b.
{(–5, 1), (–2, 0), (–2, 2), (3, 4), (6, 2)}
c.
{(–5, 1), (–2, 0), (–1, 1), (2, 4), (6, 3)}
d.
{(–5, 3), (–2, 0), (–1, 2), (6, 4), (6, 3)}

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Adistribution has the five-number summary shown below. what is the third quartile, q3, of this distribution? 22, 34, 41, 55, 62

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.