100 points Charlie bikes 9 miles every day.

Days (d)
1
2
3
4
5
Miles (m)
9
18
27
36
45

Which equation models the situation?
9 = dm
d = 9m
9d = m
d = 9 + m

9d=m

Step-by-step explanation:

the slope is 9 and miles is 9 times so it must be 9d=m

m = 9d

Step-by-step explanation:

We can find the slope by taking two points

(1,9) and (2,18)

and using

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

   =(18-9)/(2-1)

   =9/1

The equation for a line

y= mx+b where m is the slope and b is the y intercept

y = 9x+b

Substitute in a point to determine b

9 = 9(1)+b

9=9+b

b=0

y= 9x

Changing the letters

m = 9d

b

step-by-step explanation:

calculate the scale factor as the ratio of corresponding sides, image to original, that is

scale factor = = = = 1

do you mean add both of the equations together

because if you do the answer is 10x-5

step-by-step explanation: