Ineed with this promblem and i need a answer and a good explaination on this thx!
btw if u answer it you get 18points! : d

It would be 7 because he gets in an accident every other time he gets a ticket

First work out the slope of the line
slope = rise / run   if you look at the pointt level with accidents  is  you see that rise / run - = 3.5 / 7  which is 0.5
The intercept on vertical axis is 1.5 
so we can write the equation of the line ( y = mx + b) where m = slope and b = y intercept) as  y = 0.5x + 1.5   ( y = accidents and x = number tickets)

so if we plug x = 10 (tickets) into the above 

Accidents ( for 10 tickets) = 0.5(10) + 1.5 = 6.5 which we round up to 7.