Question

Find the equation of the line. Use exact numbers.

y = ?x + ?

Answer 1

y=-2x+5

Explanation:

First, find the slope. (?x)

To find the slope, use x=0 (where the line crosses the y-axis line) and then find when the next value crosses a whole number:

Since when x=0 is y=5, and x=1 is y=3, this mean that the slope goes down 2 for each time the line goes right 1, meaning that the slope is -2x.

Next, find the constant. (?)

The constant is the y value where x crosses the y-axis line. In this case, the line crosses at y=5 (5 up from the origin), meaning that the constant is +5.

This leaves you with the answer y=-2x+5.

Hope this helps!

Answer 2

y = -2x + 5

Explanation:

The y intercept is the point where the line meets the y axis, and it meets at 5.

The slope is -2/1, because it goes down 2 and over 1.