Which of the following represents a function? a. (5,1), (5,2), (5,3), (5,4)
b. (3,9), (-7,1) (6,12), (-3,-9)
c. (-5,6), (-5,6), (-5,6), (-5,6)
d. (8,3), (8,3), (-8,-3), (-8,-3)

Can someone check if i did this correct. it’s number 4 if you’re wondering.

In each of the cases that follow, the magnitude of a vector is given along with the counterclockwise angle it makes with the +x axis. use trigonometry to find the x and y components of the vector. also, sketch each vector approximately to scale to see if your calculated answers seem reasonable. (a) 50.0 n at 60.0°, (b) 75 m/ s at 5π/ 6 rad, (c) 254 lb at 325°, (d) 69 km at 1.1π rad.

Use the distance formula to find the distance between (-3,5) and (3,1)