a) the general equation for this table is -5x + 6 (y int=6)
b) is saying you have a function f(x)= 2x + 10. When x = 0, y = 10
c) the statement tells you already that the y intercept is 6
d) if you study the graph, at x = 0, y = 4.
Therefore, d) has the smallest intercept a y = 4.
7.5% = 7.5 /100 = 0.075
80 * 0.075 = 6 ← answer