Enable text based alternatives for graph display and drawing entry

Try another version of this question

Question 1
Use Euler's method with step size `0.2` to compute the approximate `y`-values `y(1.2)` and `y(1.4)`, of the solution of the initial-value problem
`y^(′) = 1 + 2 x -4 y`,   `y(1)=-3`.

`y(1.2)=`   ,

`y(1.4)=`   .