Fifteen pairs of measurements were taken at random to estimate the relation between variables X and Y. A least squares line was fitted to the collected data . The resulting residual plot is shown .

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?