Aset of data points has a line of best fit of y=2.5x-1.5
what is the residual for the point (4,7)

Residual= -1.5

Step-by-step explanation:

Given : Equation of line y=2.5x-1.5

To find : the residual for the point (4,7)

By definition of a residual is generally a quantity left over at the end of a process.

Now firstly we find the value of f at x=4

f(x) =  2.5x  -1.5

f(4) =  2.5(4)  -1.5

f(4) = 10 - 1.5

f(4) = 8.5

The residual for the point (4,7) At x=4 f(x)=7

At x=4 f(x)= 8.5

residual= 7-8.5 = -1.5

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

b

step-by-step explanation: