1 Explain when it is appropriate to use a quadratic model for a set of data.
O A quadratic model is appropriate when the first differences are constant.
O A quadratic model is appropriate when the data points lie on a line.
O A quadratic model is appropriate when the second differences are constant.
O A quadratic model is appropriate when the second differences are 0.

Shania's test scores in 8 subjects were 88, 91, 85, 74, 69, 72, 80, and 87. shania found the middle number of her scores. which type of measure did she find?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm2. what is the area of the second triangle?