A line equation written in slope-intercept form is
![y=mx+b](https://img.qammunity.org/2023/formulas/mathematics/high-school/smsb8cbft03lwblmi49nf2l6jby2ofxzws.png)
Where m represents the slope of the line and b the y-intercept. The given line in the text is
![f(x)=-5x-3](https://img.qammunity.org/2023/formulas/mathematics/high-school/57z2sj3uw7xgmtkj2sevk3qkiqjzkc15g3.png)
This line have a slope equal to - 5 and an intercept equal to - 3. Parallel lines have the same slope, therefore, our desired line have the following format
![g(x)=-5x+b](https://img.qammunity.org/2023/formulas/mathematics/high-school/lvhmnvht9pttfih0slwrvcfl6h49ewqgo2.png)
To find the intercept, we can use the point that belongs to our line.
![g(2)=12\Rightarrow12=-5\cdot2+b\Rightarrow b=22](https://img.qammunity.org/2023/formulas/mathematics/high-school/m70sqqlpfubcr5mnl5if6324trekyhv9hv.png)
Then, our line is
![g(x)=-5x+22](https://img.qammunity.org/2023/formulas/mathematics/high-school/amkvkpva634zruk6kwmbryjeax5qtu7kpv.png)