Which equation has a graph that is a parabola with a vertex at (-1, -1)?

See below.

Step-by-step explanation:

The vertex form of a parabola is

y = a(x - b)^2 + c   where (b, c) is the vertex so when the vertex is (-1, 1) the equation is

y = a(x + 1) ^2 - 1.

where a is some constant.

Is there a list to choose from?

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.