Help and explain why.

y = 2x + 1

Step-by-step explanation:

In the x column we have the numbers 2, 4, 6, 9, and 12, if you were to take any of those numbers and multiply them by 2 then add 1, you would get the corresponding number in the y column.

For example:

X column = 2, 4, 6, 9, 12

Y column = 5, 9, 15, 19, 25

Each pair is (x,y) so pair one would be (2,5), pair two would be (4,9) and so on

So to check that y = 2x + 1 is really the right equation, substitute x for a number in the x column, and y for a number in the y column.

(5) = 2(2) + 1

This is correct because it would be 5=5

As you can see 5 does equal 5.

If you were to try this with any of the other equations it would not work.

For example:

y = 3x - 1

If you were to substitute the x and y values it would not work.

(9) = 3(4) - 1

3 * 4 is 12

12 -1 is 11

9 = 11

As you can see 9 does not equal 11

i really dont know

step-by-step explanation:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: