Question 1168564

{{{y=expr(-5/2)x-7}}}
<pre>
The given line is in slope-intercept form, y=mx+b, so m=-5/2, which is the
slope of the line, [and b means that the y-intercept is the point (0,-7), which
we don't need here.]

We have to put every one of those 4 lines in slope-intercept form to see
which one has the same slope m=-5/2.

I'll do one for you. You do the other 3.

I'll do d:

{{{2x+5y=-5}}}

Add -2x to both sides:

{{{5y=-2x-5}}}

Divide every number by 5:

{{{expr(5/5)y=expr((-2)/5)x-5/5}}}

Simplify:

{{{1y=expr(-2/5)x-1}}}

{{{y=expr(-2/5)x-1}}}

Now that equation d. is in slope-intercept form and the slope is m=-2/5, which
is NOT -5/2.  Now you do the others the same way and find the one which does
have a slope of m=-5/2. 

Hmm! I just noticed that you mistyped a. because there is no " = " sign!   

Edwin</pre>