Help pls i will give 20 points and i will mark a brainliest pls answer this thank you 12. Find the slope of a line that passes through (4,5) and (2,1).

A. 2
B. 1/3
C. -2/5
D. -1

13. If the slope of a line passing through (2,7) and (3, a) is -9, then what is the value
of a?
A. -1
B. -2
C. -3
D. -4

14. What is the slope of the line 2x + 5y = 10 ?

A. 2
B. 1/3
C. -2/5
D. -1

15. What is the slope of graph A in Figure 2?

A. -2
B. -1
C. 0
D. 1

12: A(2)

14:C(-2/3)

15:D(1)

(im sorry i dont know 13)

Step-by-step explanation:

for 12 you have to do the equation y2-y1 over x2-x1 and then solve it, you get -4/-2 which converts to 2

for 14 you subtract the 2x onto the other side leaving you with 5y=-2x+10 then you have divide eveything by 5 which gives you y=-2/5+2 and -2/5 is your slope.

and for 15 you go up one over one to get to your next point therefore 1 is the slope.(rise over run)

the correct answer is 1: 2

step-by-step explanation:

hope this your welcome : )

make sure you have version 2.50

try looking in the very back of the book : )

step-by-step explanation:

you can download it here