Question

write the points(2,21.75) and (4, 21) as slope intercept form

Answer 1

\[m=\frac{21.75-21}{2-4}\]

Answer 2

y=mx+b
so you got m above
now plug in a point (x,y)=(4,21) to find b

Answer 3

insert a point into the equation
y = mx + b
and solve for b

(x,y)

Answer 4

slope = (21.75 - 21)/(2-4) = 0.75/-2 = -0.375

now use point-slope

y - 21 = -0.375(x - 4)

multiply by 1000

1000y - 21000 = -375x + 1500

add 21000

1000y = -375x + 22500

divide by 1000

y = -.375x + 22.5

Answer 5

with fractions

y = (-3/8)x + 45/2