Question 79916
y = m*x + b.  This is the equation of the slope-intercept form of a line.  It should be memorized.  In the equation above, b is actually absent.  This means it is zero.  So we have the form of y = m * x + 0.   We always only do what the problem asks us, which is to find the slope and the y intercept.  b is the y intercept, and is zero.  The slope is the m value of the line, or 7.