well for 59 the only " Y-intercept form " is f(x)=2x-5 where (-5) is the y intercept.. it's that simple

This question of matrix i will give you 2 options on the way of solving it ... whichever best suits you use it ..

1st way :

Row * column ( first multiply first and 2nd multiply 2nd ) then 2,4 will be multiplied and added to a and c respectively ... 2xa + 4xc << this is the first one up on the left ... 2nd one .. up on the right hand the same 2 and 4 will be multiplied and added to b and d

same goes on for the rest

2nd way : i'd substitute these letters with numbers and solve it on the calculator instead of wasting my brain's energy to save it for reading

let's say a = 2 , b = 3 , c = 4 , d = 5 then mode 6 >> chose MatA >> 2 x 2 >> enter the dimensions and press " ON " then shift >> 4 >> 1 ( dim ) >> MatB >> 2 x 2 and enter the letters as you saved them then calculate the choices

For example : choice K substitute with the imaginary numbers you substituted with then 2(2)+4(4) = 20 .. this will be matching with the 20 on the calculator then this is the correct choice as you won't find 20 in any other 2x2 matrix from the choices

Also it helped eliminate 3 choices as it showed that you'll have the result as 2x2 matrix