Question

Can someone PLEASE explain to me how I got this wrong and can you explain the correct answer? I'd really appreciate it.

12. What is the y-intercept (or 'b') for the equation that contains the coordinates (3,3) and (2,-2)?

A. -12
B. 5
C. 12
D. 1

I chose 5 for the answer, and it is INCORRECT.

Answer 1

Did you find your equation using point-slope formula?

Answer 2

I can help you with this one.

Answer 3

Remember, that the Y intercept is where a given point in a function intersects on the Y-axis on a plane.

So. We first need an equation.

-2 - 3 = -5
2 - 3 = -1

So your slope is 5.

Pick the first point.

y - 3 = 5(x-3)

There's your equation.

Now, plug in a Y-intercept to find if it solves the equation.

0,1

1-3 = 5 (0-3)

is -2 = -15?

No.



0,12


12- 3 = 5 ( 0-3 )

is 9 = -15?

No.


0,-12

-12 - 3 = 5 ( 0-3 )

Is -15 = -15?

Yes,

So your answer is (0,-12).

Answer 4

Bye, have a nice day.