Which of the following relation is a function?
a. (11,5), (2, -8), (7, -1), (11, -6)
b. (5, 11), (-8, 2), (-1, 7), (-6, 11)
c. (-1, 11), (-8, 2), (-1, 7), (-8, -6)
d. (5, 11), (-8, 2), (-1,7), (-1, -6)

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

Can someone me with this problem . show your work .

What does x = in this equation x+3+2x=x+5