570 - 280
= 290
568 - 276 = 292
So we know that the slope intercept form is y=mx+b
so the formula is y=3*-3+-6
First, we can see that he used the Distributive property. Then after that, he used the Additive property. After that, he combined like terms and the used the additive property again. Finally, he used the divisive property.