Answer:
A
Step-by-step explanation:
The equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (0, - 20) and (x₂, y₂ ) = (4, 10) ← 2 points on the line
m = = =
Note the line crosses the vertical axis at (0, - 20) ⇒ c = - 20, thus
f(x) = x - 20 → A
Identify the numerical coefficients of the term -5x^2y
The numerical coefficient is -5
Area = Pi x radius^2
So, since the radius is 9, you would do Pi (approx. 3.14) x 9^2
...9x9 is 81, and 81xPi is...
= 254.47
So change from 50 to 35
first find change
50-35=15
50=100%
15=x%
percent means parts out of 100
15 out of 50=x/100
15/50=x/100
30/100=x/100
30=x
the answer is 30% change