13: the table below relates the number of school lunches that you purchase and the amount of money (in dollars) that you have remaining on your school lunch card. cost of school lunch number of lunches purchased lunch card balance 0 $30.00 5 $15.00 9 $3.00 10 $0.00 the cost of school lunch is a linear function. select the best choice with regard to the rate of change. a the card balance decreases $3.00 each time 1 lunch is purchased. b the card balance decreases $12.00 each time 5 lunches are purchased. c the card balance increases $3.00 each time 1 lunch is purchased. d the card balance decreases $15.00 each time 1 lunch is purchased.

4th option is correct xy=-10

if this was to u plzz mark me the brainliest

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation: