ANOVA help last minute. This can’t be how to do it

I think I must be getting this totally wrong:

It’s just the difference between the three middle integers? Then what? That can’t be right…

So with the three middle integers you dont have to really worry about. Focus on the Coef.
and P>|t|

When youre using this the Intercept Coef. is your b and the other one is your m value in the equation of y=mx+b

The P>|t| is your p-value and you base your conclusion off of that.