Which line is the flattest (or is less steep)? Why?

y = 5x -6
y = 5x + 6
y = x - 3
y = x + 3

Slope is the the coefficent of x. You have a choice here of two slopes: 1, and 5. Either of the two y= x + ? has the same slope.

so is it the last one?

either of the last two have a slope of one. Both have the same "steepness".

Margie, I've seen this question posted a couple time and answered correctly too. I answered it below, but my answer was deleted for some reason unknown to me.
There is no "flattest (or is less steep)" line among the answers.
The first two lines are parallel with a slope of 5.
The last two are also parallel to each other, with a slope of 1, therefore the last "two" are less steep than the first two, but there is no "least steep line" since they're parallel.
Graph them to verify this. The question is stated incorrectly if it was intended to have a single correct answer.

The question asks for the flattest or less steep line among the given options. The choices are:

1. y = 5x - 6
2. y = 5x + 6
3. y = x - 3
4. y = x + 3

To determine which line is the flattest or less steep, we need to find the slope of each line. The slope is the coefficient of x in the equation.

For the first line, y = 5x - 6, the slope is 5.
For the second line, y = 5x + 6, the slope is also 5.
For the third line, y = x - 3, the slope is 1.
For the fourth line, y = x + 3, the slope is also 1.

Comparing the slopes, we can see that the first two lines have a slope of 5, while the last two lines have a slope of 1. Both sets of lines have the same "steepness."

Therefore, there is no "flattest" or "less steep" line among the options. The first two lines are parallel with a slope of 5, and the last two lines are also parallel with a slope of 1. However, it's important to note that since these lines are parallel, they have the same "steepness" and none of them is flatter or less steep.