Question

Прямая y=7x+b проходит через точку (-1; -15). Найдите b.​

Answer 1

y = 7x + b  =>  b = y - 7x

(-1; -15)  <=>  x = -1;  y = -15

b = -15 - 7(-1) = -15 + 7 = -8

Ответ:  b = -8

Answer 2

To find the value of b in the equation y = 7x + b, we can substitute the coordinates of the point (-1, -15) into the equation and solve for b.

Substituting x = -1 and y = -15 into the equation, we have:

-15 = 7(-1) + b

Simplifying the equation:

-15 = -7 + b

To isolate b, we can add 7 to both sides of the equation:

-15 + 7 = b

b = -8

Therefore, the value of b is -8.