Question

A line has a slope of 2. It passes through the points (1, 2) and (3, y) . What is the value of y?

Answer 1

Answer of y is 6.

Refer image

Answer 2

Step-byThe equation of the line with slope 2 is y=2x+b, b is a constant which should be determined. The line passes via through points (1, 2) and (3,y)

(1, 2): 2=2+b --> b=0

So, the equation of the line is y=2x. Now, when x=3, y=6. So the line y=2x passes through points (1, 2) and (3, 6). (3,y)=(3, 6).-step explanation: