Equation: y=-4x+111
Coefficient : -4
y-intercept: 111
x goes down by 4 and y goes up by 16. Since x doesn't goes down by 1, you divide the sequence of y by the sequence of x which is 16÷4=4.
And again since both y and x don't go up or both go down, the 4 becomes negative and that will be your coefficient.
And then you multiply the coefficient (-4) by any number under x and then find a number u have to add to or subtract from the x numbers to get their y's.
example; 25(-4)= -100+111=11
21 (-4)= -84+111=27
17 (-4)= -68+111=43
