The fromula of a slope:

a) (-1, -8), (-7, -4)
substitute

b) (2.1, 3.8), (3.1, 7.6)
substitute

It took her 1 hour to get to the appointment; at 80mph that means the appointment was 80 miles away.
Answer:
for the line to have a constant slope, the difference of every y- ordinate with the last ordinate has to be equal
to check this, we will use the following formula
y4 - y3 = y2 - y1
if both the LHS and the RHS are equal, the slope is constant and is irregular otherwise
5 - 8 = 7 - 3
-3 = 4
LHS ≠ RHS
Since LHS is not equal to RHS, the slope is NOT constant and hence keeps increasing or decreasing irregularly
Therefore, option 4 (Not a line) is correct
<h2>Differentiation:</h2><h3><u>Pyramids:
</u></h3>
- Pyramids have base which are in triangular or square shape which connects with the base.
- Pyramids have only one base.
- In pyramids, all sides are parallel to each other and they all meet at apex.
<h3><u>Prisms:
</u></h3>
- Prisms have two ends in a geometrical structure with same structure along the length.
- Prisms are widely used in optics.
- Prisms have two bases.
- In prisms, the base and the sides are perpendicular to each other.
Answer:
D. 32 ft^2
Step-by-step explanation:
You find the mean of the two bases 7+9= 16 16/2=8 Then multiply 8 by 4 to get 32 ft ^2