What are the x-intercepts of the graph of the function -
? use your graphing calculator to estimate the answer
o
0
(0.9273-17,0), where n is any integer
(0.9653 -03,0), where n is any integer
(0.9273-27,0), where n is any integer
(0.9653 - 2n70), where n is any integer

A) answer: the least regression equation is y = 6.3x + 38.7the least regression equation is the equation of the line that best fits the set of data, therefore it will be in the form: y = m·x + bin order to find the least regression equation, consider the pairs of data (x, y) where x = hours of sleep and y = test score (see the attached picture).1) count how many pairs you have: n.2) for each pair, compute x² and x·y.3) perform the sums: ∑x, ∑y, ∑x², ∑x·y.4)  the slope can be found by the formula  = 6.333333the y-intercept can be found by the formula: = 38.6875hence, the least regression equation is  y = 6.3·x + 38.7b) answer: the approximate test score of a student who sleeps an average of 8 h per night is 89.in order to estimate the test score for a certain amount of hours of sleep, we can use the least regression equation; let's find the value of y if x = 8 by substituting in the formula: y = 6.3·x + 38.7 if x = 8y = 6.3·8 + 38.7     y = 89.1hence, we expect that a student who sleeps 8 hours scores on average 89 on a test.