Question

What equation passes through BOTH (0,0) and (-1,5)?
A) -x+5y=0
B) y-5x
C) (y+5)=1/5 (x-1)
D) 5x+y=0


I got B. Correct?

Answer 1

Use,

\[\ y-y_1=\frac{ y_2-y_1 }{ x_2-x_1 }(x-x_1)\]

Now put the values and solve
(x1,y1)=(0,0) and
(x2,y2)=(-1,5)

Answer 2

B is not an equation. The easiest way to solve is by plugging in (0,0) and (-1,5) into an equation and see if both sides of the equation are true.

EX: 0=0
5=5

Answer 3

You didn't give us all of B) but I can see enough of the others to know that you didn't get the correct answer :-)