Which is NOT true about a direct proportion? A: Its graph must go through the origin. B:Its graph must be linear. C: Its graph must have a slope of 1. D: I ts graph must have a constant slope. (PLEASE EXPLAIN) thank you

c

Step-by-step explanation:

A direct proportion has a formula that is written this way: y=kx

what does that mean ?

There is an image at the end to make you understand .

a direct proportion is a straight line that must go from the origin . why?

simply beacuse it equals 0 in 0 . y=k*0=0 . so the coordinates of that point are (0,0) wich is the origin ! a direct proportion must have a constant slope to make it go straight or it wouldn't be a straight line . i left an image to make it clear  a diect proprtion must not have a slope of 1 . it can be 1, 2,100000 or 0.5 its graph must be linear

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.