How do you write the equation in point slope form given Point: (1, 9); Slope: 5?

1 Answer
Mar 4, 2016

y=5x+4

Explanation:

To begin, you're going to want to find your y-intercept (or b). To do this, you have to substitute your point (1,9) into an equation. Those two points represent x (1) and y (9). Like this:

y=5x+b

9 = 5 * 1 +b

9 = 5 + b

9 - 5 = b implies b = 4 (your y-intercept)

Now, since you already have your slope (5), just plug everything into your final equation (y=mx+b)

y = 5x + 4