Which is NOT true about a direct proportion? A: Its graph must go through the origin. B:Its graph must be linear. C: Its graph must have a slope of 1. D: I ts graph must have a constant slope. (PLEASE EXPLAIN) thank you

c

Step-by-step explanation:

A direct proportion has a formula that is written this way: y=kx

what does that mean ?

There is an image at the end to make you understand .

a direct proportion is a straight line that must go from the origin . why?

2

step-by-step explanation:

he used the algebra tiles correctly.

step-by-step explanation:

given : 3x(2x-1)

solution :

since he used algebra tiles .

armando's solution is the same in the solution shown in figure

as he distributed 2x into x and x and wrote them vertically

and also write   -1 vertically

and 3x into x and x and x and wrote it horizontally

performing the multiplication in the algebra tiles we get

and solving the given expression :

3x(2x-1)

since solving the expression using tiles   and solving the expression algebraically we get the same answer

thus   we can choose the first statement as the answer to this problem which is "he used the algebra tiles correctly".