Substitute the value for the variable, and state in a complete sentence whether the resulting number sentence is true or false. 15 ≥ 75. Substitute 5 for .

If true, find a value that would result in a false number sentence. If false, find a value that would result in a true number sentence.

Perpendicular lines have slopes that are the negative reciprocals of each others slopes. this means that you can:
1. write the slope as a fraction (if not already one),
2. flip the fraction over
3. multiply the fraction by - 1
4. And you have perpendicular lines slope.

so the slope of this line is - 1 so:
1. - 1 = - 1/1 convert to fraction
2. - 1/1 = - 1/1 flip but this case stays same
3. - 1/1 * - 1 = 1 multiply by - 1
4. slope is 1

we have slope and point so we can plug into equation:
y = mx + b
with m as slope and b is y intercept.

plug values:
4 = 1 * (- 2) + b
6 = b

so y intercept would be (0,6)