Test 7 Section 3 #19

Because you’re told that (1, 4) and (2, 0) are on the line, you can easily calculate its slope!

From there, just use the points you know and the slope to count steps back to the *y*-axis. It’s only one step! From (1, 4), a slope of –4 tells you that you go up 4 steps when you go left 1 step. That lands you on (0, 8). Therefore, *b* = 8.