Answers edited by Rohan N.

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• How do you find the domain and range for #y = -sin 0.25x#?
  
• How do you multiply # sqrt 2 / sqrt 10#?
  
• How do you simplify #\frac { 2x y ^ { 0} } { 3x ^ { 5} }#?
  
• How do you graph using the intercepts for #-x+3y=-5#?
  
• How do you find #f^-1(x)# given #f(x)=-1/x^2#?
  
• How do you find the vertex of # y=x^2+10x+21#?
  
• How do I find the asymptotes of #y=1/((x-1)(x-3))#?
  
• Why is the ordinary least squares method used in a linear regression?
  
• How do I perform linear regression on data?
  
• What is the slope of any line that is perpendicular to a line with a slope of #-4/3#?
  
• A line passes through #(4 ,3 )# and #(2 ,5 )#. A second line passes through #(5 ,6 )#. What is one other point that the second line may pass through if it is parallel to the first line?
  
• What is the implicit derivative of #1= x/y-e^(xy) #?
  
• How would one complete the square: #x^2 + 6x +# _?