✦ Explanation ✦
☛ We know that (-1,-3) is the vertex.
☛ Set up the parabola as y = k(x+1)²-3
☛ 1 = k(0+1)²-3
☛ k = 4
☛ y = 4(x+1)²-3 is the equation
Hope that helps! ★ If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia