{"type":"video","version":"1.0","html":"<iframe src=\"https://www.loom.com/embed/40b48e7d3bf14273aee59f13a798bf99\" frameborder=\"0\" width=\"1280\" height=\"960\" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>","height":960,"width":1280,"provider_name":"Loom","provider_url":"https://www.loom.com","thumbnail_height":960,"thumbnail_width":1280,"thumbnail_url":"https://cdn.loom.com/sessions/thumbnails/40b48e7d3bf14273aee59f13a798bf99-00001.jpg","duration":77,"title":"S3 Q12","description":"p:  The function f is defined by f(x)  = (x+3)(x+1). The graph of f in the xy-plane is a parabola. Which of the following intervals contains the x-coordinate of the vertex of the graph of f ? \na:  -4 "}