Which statement about the graph is true? y
8
7
6
5
4
3
2
1 2 3 4 5 6 7 8 x

A: The graph shows a proportional relationship because it is a line, and the difference between each point is the same.
B: The graph shows a proportional relationship because it is a line, and each x-value is a multiple of C: The graph does not show a proportional relationship because each point written as a ratio gives a different value.
D: The graph does not show a proportional relationship because a line that increases by 1 in the y-value cannot have a
constant of proportionality,

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

x/3-10=8

x/3=18

x=48

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9