Question

This graph represents a quadratic function. An upward parabola on a coordinate plane vertex at (minus 2, 2) and passes through (minus 3, 5) and (minus 1, 5). What is the value of a in the function’s equation? A. -2 B. -3 C. 2 D. 3

Answer 1

Answer: 3

Step-by-step explanation:

Substituting into vertex form, the equation is

$y=a(x+2)^2 +2$

Substituting in the coordinates (-3, 5),

$5=a(-3+2)^2 +2\\\\5=a+2\\\\a=3$