Write the equation to represent a line that contains the point (1, -7) and a slope of -4.

y = -4x - 3

Step-by-step explanation:

It is given outright that slope is -4, so right now we have:

y = -4x

Now, plug that point's values into the current formula.

-7 = -4(1) + b

-7 = -4 + b

Add 4 to both sides to get b by itself.

-3 = b

Put -3 at the end.

y = -4x - 3

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0