Which of the following represents a function?
a.
{(-1,-11), (0,-7), (1,-3), (-1,5), (2,0)}
b.
x -18 -13 3 5 -6 3
y -7 -2 14 16 5 19
c.

d.

Emily and her feiends qent to the park. they saw 15 robins and 9 blue jays. how many birds did they see? explain how you decided what number sentence to write.

Is it greater than or less than7*3_9*2

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?