Write an equation that describes the function. 1,8 2,9 3,10 4,11

y = x+7

Step-by-step explanation:

Assuming all of these numbers are ordered pairs (coordinates)  when x is 1 y is 8, when x is 2 y is 9 and so on.  If you notice y is going up by 1 every time so it follows that the starting point (y intercept) must be 7.  Therefore, our equation will be y = x + 7.  

Test it out:

Let x =2

y = 2 + 7 = 9  This matches our coordinate (2,9) so it's correct.

Let x =4

y = 4 + 7 = 11  This matches our coordinate (4,11) so it's correct.

Feel free to try out the rest of the coordinates, but usually 2 is enough to confirm that your equation is correct.

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step-by-step explanation: