Answer: Graph proportional relationships, interpreting the unit rate as the slope of the graph. Compare two different proportional relationships represented in different ways. For example, compare a distance-time graph to a distance-time equation to determine which of two moving objects has greater speed.
Step-by-step explanation:
82 percent would be ur answer
The slope of the first line is

.
To be perpendicular the slope of the second line must be the negative reciprocal of the first:

Use the slope-intercept formula:

Substitute known values:

Solve for

:

Complete the formula:
Answer:
B
Step-by-step explanation:
the sum of angles of triangle=180
B: 50+60+70=180