Describing Linear Relationships
So graphing a linear equation in fact only requires finding two pairs of values and drawing a line through the points they describe. All other points on the line will provide values for x and y that satisfy the equation. The graphs of linear equations are always lines.
The first statement "<span>y varies directly as x" means that as y increases, x also increases. To help us we need to assign a proportionality constant, k. We can now say:</span>
y=kx where k is just a constant. Then substitute the values,
180=kn
n=5k
With these equation we know that k is equal to (positive or negative) 6 and therefore we can get n to be (positive or negative) 30.
Answer:
-x^3+2x^2+4x-8
Step-by-step explanation:
(2-x)(x^2-4)
2x^2-8-x^3+4x
-x^3+2x^2+4x-8
X>5
Since 2x>11-1 is 2x>10 divide by 2
And we get x>5
