MEDAL & FAN ANYBODY ?
Use the following System of Equations to answer the following question:
2x + 5y = 15
–4x + 7y = –13
What can you say about the graphs of each equation?
a. Both equations have a positive slope.
b. The first equation has a negative slope while the second equation has a positive slope.
c. The first equation is a parabola while the second is linear.
d. The equations will form perpendicular lines.
*not c*

Question

MEDAL & FAN ANYBODY ?
Use the following System of Equations to answer the following question:
2x + 5y = 15
–4x + 7y = –13
What can you say about the graphs of each equation? 
a. Both equations have a positive slope.
b. The first equation has a negative slope while the second equation has a positive slope.
c. The first equation is a parabola while the second is linear.
d. The equations will form perpendicular lines. 
*not c*

igreen · Answer

Obviously it's not C..both are linear.

igreen · Answer

The rest compare the slopes..so we should change both of them into slope-intercept form.

2x + 5y = 15

Subtract 2x to both sides:

5y = -2x + 15

Divide 5 to both sides:

y = -2/5x + 3

------------------------

-4x + 7y = -13

Add 4x to both sides:

7y = 4x - 13

Divide 7 to both sides:

y = 4/7x - 13/7

So the slope of the first one is -2/5, and the slope of the 2nd is 4/7.

igreen · Answer

So what do you think the answer is?

anonymous · Answer

@iGreen B ?

igreen · Answer

You got it.