For the first question I would say it is a slope intercept formula problem, but for some reason, I feel like that is not the answer they are looking for.
2) You know the slope (-5) and you know the y-intercept (3)
3) You could plug in your numbers to the slope equation y=mx + b
M is your slope, b is the y-intercept
There is also another strategy you could use that is far more complicated but I will explain for the 4th question
4) The first and easiest way (but it doesn't show much work) is when you plug in your numbers to the y= mx + b equation
y = -5x + 3 (as you can see, not much work)
The second way ( writing an eq in slope intercept form given a point and a slope)
Plug in your givens to the actual slope equation y= mx + b
3 = -5 (0) + b
Do some basic algebra by multiplying -5 and 0, getting you 0.
3= 0 + b
subtract 0 from both of your sides 0-0 = 0, 3-0=3
3=b
Now you know your y intercept which is 3 and your slope was given( -5)
So your final answer is y= -5x + 3
I would suggest using the second strategy if they want you to show work even though you could just look at the points and know 3 is your y intercept. I am so sorry if this is a little confusing, it is hard to explain things through typing but I hope it helps in some way :)
