The graph of a certain quadratic y = ax^2 + bx + c is a parabola with vertex (-4,0) which passes through the point (1,-7). What is the value of a?
+2668 Recall vertex form: a(x−h)2+k=y
Substituting the vertex, we have: a(x+4)2=y
Plugging in the point, we have: 25a=−7.
Can you take it from here?
+2668 Recall vertex form: a(x−h)2+k=y
Substituting the vertex, we have: a(x+4)2=y
Plugging in the point, we have: 25a=−7.
Can you take it from here?
