Which equation has (2, -1) as a solution. ;p
a) y = 2x - 1
b)y = x + 3
c) y + x - 3
d) y = -2x + 1

None.

Step-by-step explanation:

up

step-by-step explanation:

the orientation of the parabolas can easily be found by analysing the power of x and y and their signs. if x is squared , parabola opens up and also if its coefficient is negative it opens down. if y is squared , the parabola opens right and also if its coefficient is negative it opens left. however in order to do the above analysis our equation must be in standard form .

our parabola is

which is not standard form of any parabola . hence we square on both hand side and convert it into standard form.

hence we see that x is squared and its coefficient is non negative . there for it opens up.

2 x t divided by n

step-by-step explanation: