How can you tel if a number is divisible by 3

if it goes into three evenly then it is visible by 3 .

Step-by-step explanation:

like 9 is visible by three because 3 times  is nine.

if it ends in: 3, 1, 6, 9, 0

Step-by-step explanation:

I mean not all the time

find y=mx+b

y=-2/3x+4

so m= -2/3

b= 4

what you want to do is start at 4 since b and go down 2 times then right 3 times or go up 2 times and left 3 times or just plug in the equation in desmos graphing calculator