Write y =1/3 x + 7 in standard form using integers. -x + 3y = 21 -x - 3y = 21 -x + 3y = 7 3x - y = 21

-x+3y=21

Step-by-step explanation:

times 3

3y=x+21

-x+3y=21

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.

step-by-step explanation:

subtract 7, so the answer is x < = 3, or c.