Which ordered pair in the form (a, b) is a solution of this equation?
2 answers:
Answer:
C. (7, 0)
Step-by-step explanation:
Here, the given equation,
The order pair ( in which first value shows a and second value shows b ) that satisfies the given equation is called the solution of the equation,
For (-3, -2)
3(-3) - 4(-2) = 21 ( False )
For (0, 7),
3(0) - 4(7) = 21 ( False )
For (7,0),
3(7) - 4(0) = 21 ( True )
For (-2, -3),
3(-2) - 4(-3) = 21 ( False )
Thus, only (7,0) is the solution of the given equation,
Option 'C' is correct.
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Considering the directrix and vertex given in the graph, the equation of the parabola is:
B.
The equation of a quadratic function, of vertex (h,k), is given by:
(y - k)² = 4p(x - h).
In which the directrix is the line x = h - p.
Looking at the graph, we have that:
- The vertex is (-2,-2), hence h = k = -2.
- The directrix is x = -1, hence -1 = -2 - p -> p = -1.
Thus the equation is:
(y + 2)² = -4(x + 2).
Writing x as a function of y:
B.
More can be learned about the equation of a parabola at brainly.com/question/17987697
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