book Maths Puzzle Numerical Ability

Good Morning,

I need to Graph the equation, identifying the y-intercept and put it on
a graph. I am reading the book but still confused. can you help, thanks

y = 3 - 4x

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book Other Question

4. Find the solution set for the following equation. Check for extraneous solutions:

Square root of 8 - 7x = -2(x + 1) w
- +7=2h+2
2

^that is supposed to be w over 2

I hate fractions, they confuse me soo much, getting started is usually where I get confused... THANKS!