(x²y – 3y² + 5xy²) -(-x²y + 3xy² – 3y²)
Which of the following is equivalent to the
expression above?
A) 4x²y²
B) 8xy² – 6y²
C) 2x²y + 2xy²
D) 2x²y + 8xy² – 6y²

answer is c

all work pictured and shown

correct choice is b

step-by-step explanation:

when you calculate the average rate of change of a function, you are finding the slope of the secant line between the two points. for the function the average rate of change from point to point can be calculated as

to find the average rate of change from day 2 to day 10, note that at day 2, 8 houses were sold, so a(2,8) and at day 10, 2 houses were sold, so b(10,2). thus,

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4