Question

Why is the 7 important in this equation?

y=3x+7

1) it is the slope
2) it is the golden number
3) it is the y-intercept
4) it is the x-intercept

Answer 1

3) it is the y-intercept

Explanation:

If you plug in 0 for the x value, then the answer will be 7.

Answer 2

`\boxed {\tt 3. \ It \ is \ the \ y-intercept}`

Explanation:

The line is in slope-intercept form:

y=mx+b

where m is the slope and b is the y-intercept.

We are given the equation:

y=3x+7

If we compare the two equations, we see that m and 3 correspond, while 7 and b correspond.

This means that the slope is 3 and the y-intercept is 7. So, the correct answer is 3. It is the y-intercept