Determine the quadratic function whose graph is given.
The vertex is (−1, −1).
The y-intercept is (0, 4).?

Answers

Answer #1 | 25/05 2017 16:40

The vertex tells you that the graph is shifted 1 unit to the left and 1 unit down, hence:
y = k(x+1)² − 1
Apply the y-intercept:
4 = k(0+1)² − 1
k = 5
=> y = 5(x+1)² − 1 = 5x² + 10x + 4

Positive: 55.172413793103 %

Answer #2 | 25/05 2017 16:56

y = (x+1)²(4+1)/(0+1)² - 1 which is y = 5x² + 10x + 4

Answer #1| 25/05 2017 16:4055.172413793103 %