(5,-4) (4,0) what is the slope what is the y -intercept what is the equation and is it proportional

Step-by-step explanation:

(5,-4) (4,0)

y2 = 0, y1 = -4, x2 = 4, x1 = 5

Slope m = (y2 - y1)/(x2 - x1)

m = (0 + 4)/(4 - 5)

m = 4/-1

Slope m = -4

And the equation is

y - y1 = m(x - x1)

y + 4 = -4(x - 5)

y + 4 = -4x + 20

y = -4x + 20 - 4

y = -4 + 16

That is the equation of line

So comparing with y = mx + c

C = y intercept = 16

∠acb = 8°

step-by-step explanation:

∠xba lies on the circle and is half the measure of the intercepted arc ax

hence

measure of arc ax = 2 × 42° = 84°

∠acb is outside the circle and is

∠acb = (arcab - arcax ), hence

∠acb = 0.5 (100 - 84) = 0.5 × 16° = 8°