The data shown are the final exam scores of 10 randomly selected math students and the number of hours they studied for the exam. the equation of the line of best fit for this data is a) y = 56.11x - 5.044 b) y = 5.044x + 56.11 c) y = -56.11x - 5.044 d) y = 5.044x + 5.044

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b

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