5. The cost of printing a calendar for a class fundraising project is $2.50 per 1 point calendar with a $500 design fee. Write a linear equation that represents
the total cost.
O y = 2.50x + 500
O y = 2.50% - 500
O y = 500x + 2.50
y = = 500x - 2.50

Find the directions in which the function increases and decreases most rapidly at upper p 0p0. then find the derivatives of the function in these directions. f(x,y)equals=x squared plus xy plus y squaredx2+xy+y2, upper p 0p0left parenthesis 1 comma negative 4 right parenthesis