ANSWER
She counted the squares instead of using the scale.
EXPLANATION
The slope of a line is calculated using the formula
This is the same as:
The given straight line passes through:
(4,24) and (16,18).
We plug in the values to obtain,
This is the correct expression for the slope.
But Willa mistakenly counted the squares instead of using the scale and had
Each box on the y-axis is 3 units and each box on the x-axis is 2 units.
The rise is one box along the y-axis which is equal to 3 units the run is 3 boxes which is equal to 6 units.
The line has a negative slope.
Because she just counted the boxes and did use the scale, she got a wrong answer.
Answer:
B
Step-by-step explanation:
Answer:
The slope of NP is 
⇒ B
Step-by-step explanation:
- In any square, every two opposite sides are parallel and every two consecutive sides are perpendicular
- Parallel lines have the same slope
- The product of the slopes of the perpendicular lines is -1, which means if the slope of one m, then the slope of the other is
(reciprocal m and change its sign)
- The rule of the slope of the line which passes through the points (x1, y1) and (x2, y2) is m =
In square MNPR
∵ MN and NP are adjacent sides
∴ MN ⊥ NP
∵ M = (3, 8) and N = (-2, 1)
∴ x1 = 3 and y1 = 8
∴ x2 = -2 and y2 = 1
→ Use the rule of the slope above to find the slope of MN
∴ m(MN) = 
∴ m(MN) = 
∴ m(MN) = 
∵ MN ⊥ NP
∴ The product of their slopes = -1
→ Reciprocal the slope of MN and change its sign
∴ m(NP) =
∴ The slope of NP is
Answer:
hope this helps you out good luck
