Question

Find the equation of the line.
Use exact numbers.

Answer 1

y=3x+3

Explanation:

The y-intercept is at (0,3) and when x=1, y=6. That tells us that the slope is 3. When putting all this together, we have: y=3x+3; which is the answer.

More in depth:

Mostly we look at the graph, and that's how you find the y-intercept. When you find another point on the graph, use the the slope formula:
`(y_2-y_1)/(x_2-x_1)`. When you substitute the coordinates of the points, you get a result of 3 or -3. The slope is 3, so if you get -3, you came up with two points where the second was greater than the first.