Answer:
The slope is -2
y =-2x - 1
Step-by-step explanation:
The slope is -2 or -2/1.
The slope is the change in y over the change in x. The ordered pair is written in the form (x,y) The first number is the x coordinate and the second number is the y coordinate.
(1, -3) (0, -1) The -1 and the -3 are the y coordinates. We subtract these.
-1 -(-3) is the same as
- 1 + 3 which is 2.
(1, -3) (0, 1,) the 1 and the 0 are the x coordinates. We subtract these
0 - 1 is -1
The change in y is 2 and the change in x is -1, so our slope is -2/1 which is the same as -2.
To write the equation we need the slope and the y intercept. We have the slope now. We need to find the y-intercept. We will use the slope and one of the points to find the y-intercept. It does not matter which of the two points (1,-3) or (0,-1). I will use (0,-1)
y = mx + b The b is the y-intercept which is what we are looking for
-1 = -2(0) + b
-1 = 0 + b
-1 = b
y = -2x -1
Answer: they will each spend $6.75
Step-by-step explanation:
27/4 = 6.75
Answer: 
Step-by-step explanation:
Use the formula for calculate the distance between two points:

Calculate the distance AB. Substitute the coordinates into the formula. Then:


Calculate the distance A'B'. Substitute the coordinates into the formula. Then:


As you can see, the distance A'B' is the distance AB multiplied by 1/2. Therefore, this is the scale factor.
Using pie to solve:
Circumference: 43.98 (rounded)
Area: 153.94 (rounded)
Using 3.14 for pie
Circumference: 43.96
Area: 153.86