f(-2) = 2(-2)² - 8(-2) + 6 = 30
f(-1) = 2(-1)² - 8(-1) + 6 = 16
f(0) = 2(0)² - 8(0) + 6 = 6
f(1) = 2(1)² - 8(1) + 6 = 0
f(2) = 2(2)² - 8(2) + 6 = -2
The slope-intercept form: y= mx + b
m - slope
b - y-intercept
The formula of a slope:

We have the points (6, 2) and (5, 5). Substitute:

Therefore we have y = -3x + b.
Put the coordinates of the point (5, 5) to the equation:
5 = -3(5) + b
5 = -15 + b <em>add 15 to both sides</em>
20 = b
<h3>Answer: y = -3x + 20</h3>