Question

I REALLY NEED HELP

I need some person who's great at math to help me with this assignment. I don't understand it at all. 
Like what do I coordinates to I put? What do I put where it says f(x) =? I don't Know what I'm doing! I don't even know If I graphed the first function correctly!

Answer 1

Look at the picture.

1.

`y=mx+b\\\\m=(9)/(3)=3\\\\b=4\\\\\boxed{f(x)=3x+4}`

2.

`f(x)=-2x+3\\\\for\ x=-2\to f(-2)=-2\cdot(-2)+3=4+3=7\to(-2;\ 7)\\for\ x=-1\to f(-1)=-2\cdot(-1)+3=2+3=5\to(-1;\ 5)\\for\ x=0\to f(0)=-2\cdot0+3=3\to(0;\ 3)\\for\ x=1\to f(1)=-2\cdot1+3=-2+3=1\to(1;\ 1)`

3.

`y=mx+b\\\\m=(3)/(6)=(1)/(2)=0.5\\\\b=-3\\\\\boxed{f(x)=0.5x-3}`

`for\ x=-6\to f(-6)=-6\\for\ x=-2\to f(-2)=-4\\for\ x=0\to f(0)=-3\\for\ x=6\to f(6)=0`