exam Maths Puzzle Numerical Ability

Graph the function.

f(x)=x squared+3

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exam Other Question

A butcher combines 100 lb of hamburger that costs $2.40 per pound with 60 lb of hamburger that costs $3.20 per pound. Find the cost of the hamburger mixture. Consider the line y= -1/4x+4

What is the slope of a line parallel to this line?
What is the slope of a line perpendicular to this line?