Answer:
 
     
Step-by-step explanation:
To write the equation of the line in slope-intercept form, use the slope-intercept formula,  . Find real values for the
. Find real values for the  and
 and  and substitute them into the formula.
 and substitute them into the formula.  
1) We know that  represents the slope, so substitute 1 in its place.  However, we still need to find
 represents the slope, so substitute 1 in its place.  However, we still need to find  , or the y-intercept. So, along with substituting that 1 in for
, or the y-intercept. So, along with substituting that 1 in for  , substitute the x and y values for (7,0) for the x and y in the formula as well. Then, isolate
, substitute the x and y values for (7,0) for the x and y in the formula as well. Then, isolate  to find its value:
 to find its value: 

So,  = -7.
 = -7.  
2) Now, just substitute the found values for  and
 and  into the slope-intercept formula. Remember that the slope is
 into the slope-intercept formula. Remember that the slope is  , so substitute 1 in, and
, so substitute 1 in, and  is -7, so substitute -7 in its place as well. This gives the following equation in slope-intercept form:
 is -7, so substitute -7 in its place as well. This gives the following equation in slope-intercept form: 
 or
 or 