Answer = –3/2
Use rise/run to find the gradient, while finding the difference between the two points.
Equation of slope:
y2 - y1 / x2 - x1
-1-2 / 3-1
–3/ 2
Slope = –3/2
Which of what? Where are the options?
Probability to get an bad battery
=10/25
=2/5
Probability that all 4 are bad
=2/5×2/5×2/5×2/5
=16/625