Answer: Equation: y = 2x - 1
Explanation:
Find the gradient
then use equation of a straight line
y = mx+C
m is gradient which is 2
plot either one of the 2 points and also the gradient in to find the C
7 = 2(4) + C
C = 7 - 8
C = 1
Equation: y = 2x - 1