We know that function f(x) is given by
![f(x)=x](https://img.qammunity.org/2023/formulas/mathematics/high-school/gebl79pm4c95ylzf6ot1lfbwst7sncfgmp.png)
where the slope is the coefficient of the variable x, that is, the slope,m, is
![m=1](https://img.qammunity.org/2023/formulas/mathematics/high-school/hnmxeo06z7telsynq10n0tb8aseh5zkiei.png)
Since g(x) is given by
![g(x)=6\cdot f(x)](https://img.qammunity.org/2023/formulas/mathematics/high-school/e9pscilttqkg9ve472u8h99paqytqlaum9.png)
we have that
![g(x)=6x](https://img.qammunity.org/2023/formulas/mathematics/high-school/w1yvjlipm9q6r5w4jfl4gdopyd0z1oqxy1.png)
where the slope is equal to 6, in other words
![m\longrightarrow m=6*1=6](https://img.qammunity.org/2023/formulas/mathematics/high-school/cqrb5cpmkianhzknggkc8bhg1uf11y9w9h.png)
Therefore, the slope of the graph of g(x) is 6 times the slope of the graph of f(x).
Since the y-intercept of f(x) is zero, then the y-intercept of g(x) is zero too. Then, the answer is: the y-intercept does not change.