Question

Slope = four fifths ,y-intercept = -1

Answer 1

Slope-intercept form:
y=mx+b

m=slope
b=y-intercept 

Data:
m=4/5
b=-1

y=mx+b
y=(4/5)x-1

Answer: the equation of the line with slope=4/5, and y-intercept=-1 would be:
y=(4/5)x-1