What is the slope of (3,9) and (5,7)

The slope is 1 and the y-intercept is 4.

Step-by-step explanation:

According to the rise-over-run formula:

y2 - y1

x2 - x1

We can insert 9 and 7 into the top (y) half

9 - 7

x2 - x1

and we can insert 5 and 3 to the bottom (x) half.

9 - 7

5 - 3

Continuing:

2 = 1

2    1

Slope = 1.

(Finding y-intercept you can insert (3, 9) or (5, 7) into y = mx+b, finding B and inserting your slope into m.)

d? maybe

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!