Find the slope of the line that passes through (81, -18) and (7, -56).

Slope (m) =

ΔY

ΔX

=

38

79

=

0.48101265822785

θ =  

arctan(

ΔY

) + 180°

ΔX

=

205.68814343565°

ΔX = 7 – 86 = -79

ΔY = -56 – -18 = -38

Distance (d) = √ΔX2 + ΔY2 = √7685 = 87.664131775772

Equation of the line:

y = 0.48101265822785x – 59.367088607595

or

y =  

38

x

79

–  

4690

79

When x=0, y = -59.367088607595

When y=0, x = 123.42105263158

19/37

Step-by-step explanation:

(-18-(-56))/(81-7)

38/74

19/37

on friday there were 15 birds

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!