Question

What is the equation of a line whose slope is -2 and whose y-intercept is 4?

Answer 1

y=-2x+4

Explanation:

if y is 4..it means x intercept is 0

gradient is -2

and we know gradient is the change in y /change in X

so: we let the second intercepts to be (x,y)

so y-4/x-0=-2

multiply by x-0 both sides then collect like terms together

it will be y= -2x+4