Answer:
A. 2.2
Step-by-step explanation:
The average rate of change between 2 x values is the total change of the y values (output values) divided by the change in the x values.Slope is special situation of that.
point 1 (x₁,y₁) → ( 2,7.5)
point 2 (x₂,y₂) → ( 18,42.5)
slope = 42.5 -7.5/18-2 =35 / 16 = 2.1875 ≈ 2.2
Pascal's triangle up to the 5th iteration is

This tells us

so the second term in the expansion is

Answer: 3.125
Step-by-step explanation:
Given
Triangle is dilated by a factor of
i.e. each side multiplies to 0.25.
Side E'F' becomes 0.25 times the original length
