Answer:
y = 4x
Step-by-step explanation:
Using two points, (1, 4) and (2, 8),
Slope = [tex] m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{8 - 4}{2 - 1} = \frac{4}{1} = 4 [/tex]
m = 4
Substitute m = 4, x = 1, and y = 4 into y = mx + b.
Thus:
4 = (4)(1) + b
4 = 4 + b
4 - 4 = b
0 = b
b = 0
To find the equation, substitute m = 4 and b = 0 into y = mx + b
Thus:
y = (4)(x) + 0
y = 4x
