(a) you have two points: (80,5) and (40,13)
so, the slope is (13-5)/(40-80) = 8/-50 = -1/5
Now you have a point and a slope, so the line is
y-5 = -1/5 (x-80)
I assume you can convert that to slope-intercept form for part (b)
When jeans sell for $80, 5 pairs are sold each day. when jeans are on sale for $40, 13 pairs of jeans are sold each day.
a) Calculate the slope
b) Calculate the y-intercept
1 answer
1 answer