What does the equation y = x2 represent as a curve in the set of real numbers2?

Actually the given equation y = x^2 represents a parabola in the set of real numbers. A parabola is defined to be a symmetrical open plane curve created by the intersection of a cone with a plane parallel to its side. Since the square is on the x, therefore the parabola is opening upwards.

Parabola

equal to

step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18