Question

Find the gradient of each of these line y = 2x + 4

Answer 1

We Know, Principle equation of a line is:  y = mx + c
Here, we have: y = 2x + 4

Compare the equations, 
Gradient of line (m) would be equal to 2

In short, Your Answer would be 2

Hope this helps!

Answer 2

Y = 2x + 4

comparing to y = mx + c, where m = slope or gradient of the line and c = vertical intercept.

y = 2x + 4   and y = mx + c

m = 2

Hence the slope or gradient of the line = 2

Hope this explains it.