Answer:
3.) 63=3x+7y
4.) Y-intercept is 9
Step-by-step explanation:
(For 3) For every time a person gets a touchdown, x represents that
for every time a person person scored a successful extra-point attempt, y represents that.
And they team scores 63, so....
the equation would look like this
63=3x+7y
(For 4) You find the y-intercept by turning the standard form equatio into the slop intercept form
[tex](-3x)63=3x+7y (-3x)\\(\frac{1}{7}) 7y=(-3x+63)(\frac{1}{7} )\\y=-\frac{3x}{7} +9[/tex]
(Helper's note, multiplying by its reciprocal is the same as dividing it by a whole number, in the case dividing the number by 7 is the save as multiplying the number by [tex]\frac{1}{7}[/tex])
Then plugging x=0 and solve for y, which in this case, y=9
[tex]y=\frac{-3(0)}{7} +9\\y=9[/tex]
(For the graphing) Turn 63=3x+7y into a slope intercept form, which is [tex]y=-\frac{3x}{7} +9[/tex] and graph from there
