2,114 x 98 *100 points show work

Y=4x^2+x-1 solve using quadratic formula

The given dot plot represents the average daily temperatures, in degrees fahrenheit, recorded in a town during the first 15 days of september. if the dot plot is converted to a box plot, the first quartile would be drawn at __ , and the third quartile would be drawn at link to the chart is here

How do you determine if an ordered pair is a solution to a given equation?