Question

I do not understand this at all. help please

Answer 1

Remark

What you are trying to do is isolate the y value. Then you just interpret what you found.

Equation

-9x + 10y = - 9

Solve

x and y must be on opposite sides of the equal sign. Add 9x to both sides.

10y =  9x - 9                  Divide by 10

y = 9x/10 - 9/10

There's the equation. Now all you need do is interpret it.

Meaning

The general equation for this situation is

y = mx + b

m (the number in front of the x) is the slope

y = 9/10 x - 9/10

So the slope is 9/10

b  is the number by itself on the right. It is the y-intercept and it it -9/10

Since slope is greater than 0, C cannot be right.

Since the y intercept is less than 0, A, B, and C are all incorrect which leaves D

Answer D

Answer 2

Equation:

-9x+10y=-9

10y=9x-9

y=9/10x-9/10

Slope: 9/10

Y intercept:  -9/10

So your answer is D