An arithmetic sequence is a sequence in which each term is found by adding a constant to the previous term. Since we are adding a constant, the data increases or decreases at a constant rate; this describes a linear function. This is because when graphing the sequence, the distance between any two successive points is the same.
Linear mathematical models describe real world applications with the use lines. For instance, a car going 50 mph, has traveled a distance represented by y=50x, where x is time in hours and y is miles. The equation and graph can be used to make predictions.
The answer is actually 7.0 because the lengths of the triangle are both going to be 5 and the hypotenuse is then 5 square root of 2 which is 7.07 so if you round it’s 7.0