22,351 + 431,986 = <span>454,337
454,337 + 431,986 = </span><span>886,323
during the two years </span><span>886323 people visited </span>

Differentiate both sides with respect to <em>x</em>, assuming <em>y</em> = <em>y</em>(<em>x</em>).




Solve for d<em>y</em>/d<em>x</em> :



If <em>y</em> ≠ 0, we can write

At the point (1, 1), the derivative is

Use the slope formula

and plug in the values for x and y.
Let angle be x
4 times complement = 4(90 - x)
2/3 times its supplement = 2/3(180 - x)
4(90 - x) = 2/3 (180 - x)
360 - 4x = 120 - 2/3 x
240 = 3 1/3 x
x = 240 / 10/3 = 240 * 3/10 = 72 degrees Answer
Y=1/2x +0. You add the 2x to the other side, and then divide everything by 4 to have only 1y.