Question

What is the equation of the line that contains the
points (3, 5) and (7, 9)?
a. y = 2x - 1
b. y=x+2
c. y=x-2
d. y = 2x-5

Answer 1

Answer:

B

Step-by-step explanation:

y=kx+m

k=y2+y1 / x2+x1

(3,5) and (7,9)

k=(9-5)/(7-3)=4/4=1

Now we want to find out what m is. This is by inserting a point in the equation of the line y=kx+m.

so I'll pick (3,5)

5=1×3+m

m= 2

To check if it's correct we could try it with the other point, (7,9).

9=1×7+m

m=2

Therefor the equation would be. y=1x+2