Answer:
slope = -3
x-intercept = (4/3,0) = (1.33,0)
y-intercept = (0,4)
f(-1) = 7
Explanation:
Take 2 known points
i.e (0,4) and (1,1) from the graph
slope = (1-4)/(1-0) = -3
now we have
linear equation
y = mx+c
we have (0,4)
4 = -3 * 0 + C
C =4
so the equation of line is
y = -3x + 4
now
f(-1) = -3 * -1 +4 = 3+4 =7
for x intercept, put y = 0
o = -3x + 4
x = -4/-3 = 4/3
for y intercept, x = 0
y = -3 * 0 + 4 = 0+4 = 4