How can we write an expression to show 3 less than a number?
 start by drawing a diagram to model the subtraction. are we taking away from the 3 or the unknown number?
 what expression would represent this model?

x - 3

Step-by-step explanation:

Let x be the unknown number,

For making the diagram to model this problem,

Take a grid that shows x,

Divide this grid into two parts,

If first part is of 3 then second part would be x - 3

That is, we are taking away 3 from the unknown number,

Hence, the required expression would be x - 3

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

answer:   rotate 270° clockwise about (7, 1) and reflect across the line x = 7

step-by-step explanation:

because i took test