A cell phone plan costs $200 to start, then there is $50 charge each month 3. Graph the cost of the cell phone plan over a period of two years, using months as the unit of time. Be sure to label your axes and scale them by labeling each gridline with a number. 4. Is there a proportional relationship between time and the cost of the cell phone plan? Explain how you know

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

28

step-by-step explanation:

8+8+6+6

1/6

step-by-step explanation: