Question

Which graph could be used to show the situation described?

Answer 1

Answer:

Option (2) [Graph on the top right]

Step-by-step explanation:

To find the temperature decrease by 0.5 degrees every hour we will find the slopes of the lines given in every option.

Option (1) [Top left graph]

Slope = $\frac{\text{Rise}}{\text{Run}}$

          = $\frac{-20}{2}$

          = -10

Option (2) [Top right]

Slope = $\frac{-2}{4}$

          = -0.5

Option (3) [Bottom left]

Slope = $\frac{-2}{2}$

          = -1

Option (4) [Bottom right]

Slope = $\frac{-60}{5}$

          = -12

Therefore, Graph given in option (2) will represent the decrease in temperature by 0.5 degrees per hour.