Mr. Hanson recorded the typing speeds (in words
per minute) of 25 students and their weeks of
experience. The line of best fit for the data
is y = 4.4x + 18.9, where x is the number of
weeks of experience of a student and y is the
student's typing speed. What is the meaning of
the y-intercept for this set of data?
A.
the average typing speed of the students
B.
the highest typing speed recorded
C. the improvement in typing speed per week for
the average student
D. the typing speed of a student with no
experience

i think the answer is A. the average typing speed of the students but im not sure

plz let me know if i was right :)

x/7.50 = 15

x= 7.50 / 15 divide

step-by-step explanation:

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: