Question

Line E has a slope of 4
FIND THE EQUATION

Answer 1

y=4x. if it passes through the point 0,0

Answer 2

The equation of a line is
y = mx+ b (REMEMBER THIS!!!!!!!!!)

y= output
x = input
b = y-intercept or where y=0 (x,0)
m = slope

so from what you have all you can determine is that

y = 4x + b

Answer 3

But yeah I can't stress it enough y = mx + b is important to know, as it has real world applications especially in instrumentation