Get points look at pictur 15 points

2. y=2x+3 

When x =0 and y= something, the 'something' is your y-intercept which is b in the y=mx+b formula.  Then we look at what is changed in the x and y value to determine the m part.  the x increase by 1 and y increase by 2 so the m part is 2. 

3. y=-7x 
Same as the last one, there is no y-inter this time because the y=0 when x=0/  So the y deceased by 7 each time and x incease by 1 so it is -7 for the m part.

#2. 2x+3 because for example if you do 2x0+3 your output would be 3 which is the first Y on the tabel. and if u do 2x1+3 ur output would be 5 and so the pattern goes on.