# Ex.15.1 Q7 Introduction to Graphs Solutions - NCERT Maths Class 8

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## Question

Can there be a time temperature graph as follows? Justify you’re answer:

## Text Solution

**Reasoning:**

We cannot have different temperatures at the same time.

**Steps:**

(i) This can be a time−temperature graph, as the temperature can increase with the increase in time.

(ii) This can be a time−temperature graph, as the temperature can decrease with the decrease in time.

(iii) This cannot be a time−temperature graph since different temperatures at the same time are not possible.

(iv) This can be a time−temperature graph, as same temperature at different times is possible.