The sum of a number b and 7.5 is 4.8

B + 7.5 = 4.8
     -7.5   -7.5

         b  =   -2.7

Hope this helps

You can also check your answer by doing replacing the number with the variable ( don't just write the anwser just because you know it, since its pre algebra you have to do it algebraically like above)

-2.7 + 7.5 = 4.8

Hope it helps!

The correct graph is the second one, with the points being at (-6,0), (2,0) and reaching down to (-2,-8)

Socrat use det app ok