Question

What answer do i need to put in the boxes

Answer 1

Y-65=3(x-49) 3 is time 49 is crushed

Answer 2

You calculate the slope by subtracting two adjacent y values, but watch out, the x increase is 2 in this case! 

E.g., from x=3 to 5, the y increases from 49 to 65. That's a difference of 16, so per minute that is only 8. So 8 is our slope.

Because the formula uses the y value (of 65) at x=5, you want the right hand side to be 0 at x=5.

So the equation must be y - 65 = 8 (x-5)