Question

Find the explicit formula and the type of function
X Y
-2 -1
-1 -3
0 -5
1 -7
2 -9

Answer 1

Let's examine this, as x increases by 1, what happens to the y-value? The y-value decreases by 2, so the slope is -2. When x = 0, we have our y-intercept, -5. So we can fill in Slope form with the Slope and Y-intercept that the equation is:

y = -2x - 5