Answer:
y = 7x - 22
Step-by-step explanation:
We know that point-slope form is y = mx + b (b is y-intercept, m is slope, and the y and x is of any point on the line)
We can plug in m as 7, y as -1, and x as 3 to get:
-1 = 21 + b
You can subtract 21 on both side to get b = -22.
Then, we plug in m = 7 and b = -22 to y = mx+b to get y = 7x + (-22) which simplifies to:
y = 7x - 22
